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Date: Wed, 27 Oct 2010 19:20:35 -0400
From: "Theodore Ts'o" <tytso@....edu>
To: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: linux-kernel@...r.kernel.org
Subject: Perf can't deal with many tracepoints
Perf will drop dead if it comes across tracepoints that have anything
but primitive structure accessors in the TP_printk() section of the
tracepoint definition. For example, the ext4 and jbd2 tracepoints uses
jbd2_dev_to_name() to translate a dev_t to a string. The block I/O
tracepoints uses MAJOR() and MINOR() to translate a dev_t to a
major/minor number pair. Both do this in TP_printk. This results in a
fatal error:
# perf record -R -c 1 -e ext4:ext4_da_writepages sh -c "cp -r /boot /test; sync"
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.110 MB perf.data (~4786 samples) ]
# perf trace -i perf.data
Fatal: no argument match
cp-9792 [007] 1181919.509759: ext4_da_writepages: dev jbd2_dev_to_name ino
There are people roaming around trying to convince me that perf is the
One True Way to do everything, including tracepoints. But there are a
whole bunch of tracepoints that perf can't handle. It seems to me we
have three possible solutions:
1) Accept there are some tracepoints perf just can't handle, and just
say that ftrace is the only way people can use those tracepoints
2) Enforce a rule which says that nothing other than primitive structure
accessors are allowed, in which case we need a patch such like the one
attached. (We will need to audit all tracepoints; it's more than just
ext4, as I've mentioned --- and yes, the patch below is ugly. But it
may be what I have to do to accomodate perf --- or maybe I should just
tell people that perf is not supported, and if you want to use ext4 or
block I/O tracepoints, you should use ftrace?)
3) Figure out some way of making perf smarter; I don't know how to do
that in the general case, since it can't handle arbitrary C statements.
But maybe it could be taught how to handle dev_t's in some intelligent
fashion, perhaps. And then combine this with either (1) or (2) above.
What say ye?
- Ted
commit 6e0312bf2ff174ea861e5c5436f87660963ade8d
Author: Theodore Ts'o <tytso@....edu>
Date: Wed Oct 27 18:59:25 2010 -0400
ext4,jbd2: Convert tracepoints to use major/minor numbers
Unfortunately perf can't deal with anything other than direct structure
accesses in the TP_printk() section. It will drop dead when it sees
jbd2_dev_to_name() in the "print fmt" section of the tracepoint.
Addresses-Google-Bug: 3138508
Signed-off-by: "Theodore Ts'o" <tytso@....edu>
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index b5f4938..8f59db1 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -21,7 +21,8 @@ TRACE_EVENT(ext4_free_inode,
TP_ARGS(inode),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( ino_t, ino )
__field( umode_t, mode )
__field( uid_t, uid )
@@ -30,7 +31,8 @@ TRACE_EVENT(ext4_free_inode,
),
TP_fast_assign(
- __entry->dev = inode->i_sb->s_dev;
+ __entry->dev_major = MAJOR(inode->i_sb->s_dev);
+ __entry->dev_minor = MINOR(inode->i_sb->s_dev);
__entry->ino = inode->i_ino;
__entry->mode = inode->i_mode;
__entry->uid = inode->i_uid;
@@ -38,9 +40,10 @@ TRACE_EVENT(ext4_free_inode,
__entry->blocks = inode->i_blocks;
),
- TP_printk("dev %s ino %lu mode 0%o uid %u gid %u blocks %llu",
- jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino,
- __entry->mode, __entry->uid, __entry->gid,
+ TP_printk("dev %d,%d ino %lu mode 0%o uid %u gid %u blocks %llu",
+ __entry->dev_major, __entry->dev_minor,
+ (unsigned long) __entry->ino, __entry->mode,
+ __entry->uid, __entry->gid,
(unsigned long long) __entry->blocks)
);
@@ -50,20 +53,22 @@ TRACE_EVENT(ext4_request_inode,
TP_ARGS(dir, mode),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( ino_t, dir )
__field( umode_t, mode )
),
TP_fast_assign(
- __entry->dev = dir->i_sb->s_dev;
+ __entry->dev_major = MAJOR(dir->i_sb->s_dev);
+ __entry->dev_minor = MINOR(dir->i_sb->s_dev);
__entry->dir = dir->i_ino;
__entry->mode = mode;
),
- TP_printk("dev %s dir %lu mode 0%o",
- jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->dir,
- __entry->mode)
+ TP_printk("dev %d,%d dir %lu mode 0%o",
+ __entry->dev_major, __entry->dev_minor,
+ (unsigned long) __entry->dir, __entry->mode)
);
TRACE_EVENT(ext4_allocate_inode,
@@ -72,21 +77,24 @@ TRACE_EVENT(ext4_allocate_inode,
TP_ARGS(inode, dir, mode),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( ino_t, ino )
__field( ino_t, dir )
__field( umode_t, mode )
),
TP_fast_assign(
- __entry->dev = inode->i_sb->s_dev;
+ __entry->dev_major = MAJOR(inode->i_sb->s_dev);
+ __entry->dev_minor = MINOR(inode->i_sb->s_dev);
__entry->ino = inode->i_ino;
__entry->dir = dir->i_ino;
__entry->mode = mode;
),
- TP_printk("dev %s ino %lu dir %lu mode 0%o",
- jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino,
+ TP_printk("dev %d,%d ino %lu dir %lu mode 0%o",
+ __entry->dev_major, __entry->dev_minor,
+ (unsigned long) __entry->ino,
(unsigned long) __entry->dir, __entry->mode)
);
@@ -98,7 +106,8 @@ DECLARE_EVENT_CLASS(ext4__write_begin,
TP_ARGS(inode, pos, len, flags),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( ino_t, ino )
__field( loff_t, pos )
__field( unsigned int, len )
@@ -106,15 +115,17 @@ DECLARE_EVENT_CLASS(ext4__write_begin,
),
TP_fast_assign(
- __entry->dev = inode->i_sb->s_dev;
+ __entry->dev_major = MAJOR(inode->i_sb->s_dev);
+ __entry->dev_minor = MINOR(inode->i_sb->s_dev);
__entry->ino = inode->i_ino;
__entry->pos = pos;
__entry->len = len;
__entry->flags = flags;
),
- TP_printk("dev %s ino %lu pos %llu len %u flags %u",
- jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino,
+ TP_printk("dev %d,%d ino %lu pos %llu len %u flags %u",
+ __entry->dev_major, __entry->dev_minor,
+ (unsigned long) __entry->ino,
__entry->pos, __entry->len, __entry->flags)
);
@@ -141,7 +152,8 @@ DECLARE_EVENT_CLASS(ext4__write_end,
TP_ARGS(inode, pos, len, copied),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( ino_t, ino )
__field( loff_t, pos )
__field( unsigned int, len )
@@ -149,16 +161,18 @@ DECLARE_EVENT_CLASS(ext4__write_end,
),
TP_fast_assign(
- __entry->dev = inode->i_sb->s_dev;
+ __entry->dev_major = MAJOR(inode->i_sb->s_dev);
+ __entry->dev_minor = MINOR(inode->i_sb->s_dev);
__entry->ino = inode->i_ino;
__entry->pos = pos;
__entry->len = len;
__entry->copied = copied;
),
- TP_printk("dev %s ino %lu pos %llu len %u copied %u",
- jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino,
- __entry->pos, __entry->len, __entry->copied)
+ TP_printk("dev %d,%d ino %lu pos %llu len %u copied %u",
+ __entry->dev_major, __entry->dev_minor,
+ (unsigned long) __entry->ino, __entry->pos,
+ __entry->len, __entry->copied)
);
DEFINE_EVENT(ext4__write_end, ext4_ordered_write_end,
@@ -199,21 +213,23 @@ TRACE_EVENT(ext4_writepage,
TP_ARGS(inode, page),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( ino_t, ino )
__field( pgoff_t, index )
),
TP_fast_assign(
- __entry->dev = inode->i_sb->s_dev;
+ __entry->dev_major = MAJOR(inode->i_sb->s_dev);
+ __entry->dev_minor = MINOR(inode->i_sb->s_dev);
__entry->ino = inode->i_ino;
__entry->index = page->index;
),
- TP_printk("dev %s ino %lu page_index %lu",
- jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino,
- __entry->index)
+ TP_printk("dev %d,%d ino %lu page_index %lu",
+ __entry->dev_major, __entry->dev_minor,
+ (unsigned long) __entry->ino, __entry->index)
);
TRACE_EVENT(ext4_da_writepages,
@@ -222,7 +238,8 @@ TRACE_EVENT(ext4_da_writepages,
TP_ARGS(inode, wbc),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( ino_t, ino )
__field( long, nr_to_write )
__field( long, pages_skipped )
@@ -236,7 +253,8 @@ TRACE_EVENT(ext4_da_writepages,
),
TP_fast_assign(
- __entry->dev = inode->i_sb->s_dev;
+ __entry->dev_major = MAJOR(inode->i_sb->s_dev);
+ __entry->dev_minor = MINOR(inode->i_sb->s_dev);
__entry->ino = inode->i_ino;
__entry->nr_to_write = wbc->nr_to_write;
__entry->pages_skipped = wbc->pages_skipped;
@@ -249,8 +267,8 @@ TRACE_EVENT(ext4_da_writepages,
__entry->writeback_index = inode->i_mapping->writeback_index;
),
- TP_printk("dev %s ino %lu nr_to_write %ld pages_skipped %ld range_start %llu range_end %llu nonblocking %d for_kupdate %d for_reclaim %d range_cyclic %d writeback_index %lu",
- jbd2_dev_to_name(__entry->dev),
+ TP_printk("dev %d,%d ino %lu nr_to_write %ld pages_skipped %ld range_start %llu range_end %llu nonblocking %d for_kupdate %d for_reclaim %d range_cyclic %d writeback_index %lu",
+ __entry->dev_major, __entry->dev_minor,
(unsigned long) __entry->ino, __entry->nr_to_write,
__entry->pages_skipped, __entry->range_start,
__entry->range_end, __entry->nonblocking,
@@ -265,7 +283,8 @@ TRACE_EVENT(ext4_da_write_pages,
TP_ARGS(inode, mpd),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( ino_t, ino )
__field( __u64, b_blocknr )
__field( __u32, b_size )
@@ -276,7 +295,8 @@ TRACE_EVENT(ext4_da_write_pages,
),
TP_fast_assign(
- __entry->dev = inode->i_sb->s_dev;
+ __entry->dev_major = MAJOR(inode->i_sb->s_dev);
+ __entry->dev_minor = MINOR(inode->i_sb->s_dev);
__entry->ino = inode->i_ino;
__entry->b_blocknr = mpd->b_blocknr;
__entry->b_size = mpd->b_size;
@@ -286,8 +306,9 @@ TRACE_EVENT(ext4_da_write_pages,
__entry->pages_written = mpd->pages_written;
),
- TP_printk("dev %s ino %lu b_blocknr %llu b_size %u b_state 0x%04x first_page %lu io_done %d pages_written %d",
- jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino,
+ TP_printk("dev %d,%d ino %lu b_blocknr %llu b_size %u b_state 0x%04x first_page %lu io_done %d pages_written %d",
+ __entry->dev_major, __entry->dev_minor,
+ (unsigned long) __entry->ino,
__entry->b_blocknr, __entry->b_size,
__entry->b_state, __entry->first_page,
__entry->io_done, __entry->pages_written)
@@ -300,7 +321,8 @@ TRACE_EVENT(ext4_da_writepages_result,
TP_ARGS(inode, wbc, ret, pages_written),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( ino_t, ino )
__field( int, ret )
__field( int, pages_written )
@@ -310,7 +332,8 @@ TRACE_EVENT(ext4_da_writepages_result,
),
TP_fast_assign(
- __entry->dev = inode->i_sb->s_dev;
+ __entry->dev_major = MAJOR(inode->i_sb->s_dev);
+ __entry->dev_minor = MINOR(inode->i_sb->s_dev);
__entry->ino = inode->i_ino;
__entry->ret = ret;
__entry->pages_written = pages_written;
@@ -319,8 +342,8 @@ TRACE_EVENT(ext4_da_writepages_result,
__entry->writeback_index = inode->i_mapping->writeback_index;
),
- TP_printk("dev %s ino %lu ret %d pages_written %d pages_skipped %ld more_io %d writeback_index %lu",
- jbd2_dev_to_name(__entry->dev),
+ TP_printk("dev %d,%d ino %lu ret %d pages_written %d pages_skipped %ld more_io %d writeback_index %lu",
+ __entry->dev_major, __entry->dev_minor,
(unsigned long) __entry->ino, __entry->ret,
__entry->pages_written, __entry->pages_skipped,
__entry->more_io,
@@ -334,20 +357,23 @@ TRACE_EVENT(ext4_discard_blocks,
TP_ARGS(sb, blk, count),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( __u64, blk )
__field( __u64, count )
),
TP_fast_assign(
- __entry->dev = sb->s_dev;
+ __entry->dev_major = MAJOR(sb->s_dev);
+ __entry->dev_minor = MINOR(sb->s_dev);
__entry->blk = blk;
__entry->count = count;
),
- TP_printk("dev %s blk %llu count %llu",
- jbd2_dev_to_name(__entry->dev), __entry->blk, __entry->count)
+ TP_printk("dev %d,%d blk %llu count %llu",
+ __entry->dev_major, __entry->dev_minor,
+ __entry->blk, __entry->count)
);
DECLARE_EVENT_CLASS(ext4__mb_new_pa,
@@ -357,7 +383,8 @@ DECLARE_EVENT_CLASS(ext4__mb_new_pa,
TP_ARGS(ac, pa),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( ino_t, ino )
__field( __u64, pa_pstart )
__field( __u32, pa_len )
@@ -366,16 +393,18 @@ DECLARE_EVENT_CLASS(ext4__mb_new_pa,
),
TP_fast_assign(
- __entry->dev = ac->ac_sb->s_dev;
+ __entry->dev_major = MAJOR(ac->ac_sb->s_dev);
+ __entry->dev_minor = MINOR(ac->ac_sb->s_dev);
__entry->ino = ac->ac_inode->i_ino;
__entry->pa_pstart = pa->pa_pstart;
__entry->pa_len = pa->pa_len;
__entry->pa_lstart = pa->pa_lstart;
),
- TP_printk("dev %s ino %lu pstart %llu len %u lstart %llu",
- jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino,
- __entry->pa_pstart, __entry->pa_len, __entry->pa_lstart)
+ TP_printk("dev %d,%d ino %lu pstart %llu len %u lstart %llu",
+ __entry->dev_major, __entry->dev_minor,
+ (unsigned long) __entry->ino, __entry->pa_pstart,
+ __entry->pa_len, __entry->pa_lstart)
);
DEFINE_EVENT(ext4__mb_new_pa, ext4_mb_new_inode_pa,
@@ -403,7 +432,8 @@ TRACE_EVENT(ext4_mb_release_inode_pa,
TP_ARGS(sb, inode, pa, block, count),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( ino_t, ino )
__field( __u64, block )
__field( __u32, count )
@@ -411,15 +441,16 @@ TRACE_EVENT(ext4_mb_release_inode_pa,
),
TP_fast_assign(
- __entry->dev = sb->s_dev;
+ __entry->dev_major = MAJOR(sb->s_dev);
+ __entry->dev_minor = MINOR(sb->s_dev);
__entry->ino = inode->i_ino;
__entry->block = block;
__entry->count = count;
),
- TP_printk("dev %s ino %lu block %llu count %u",
- jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino,
- __entry->block, __entry->count)
+ TP_printk("dev %d,%d ino %lu block %llu count %u",
+ __entry->dev_major, __entry->dev_minor,
+ (unsigned long) __entry->ino, __entry->block, __entry->count)
);
TRACE_EVENT(ext4_mb_release_group_pa,
@@ -429,20 +460,23 @@ TRACE_EVENT(ext4_mb_release_group_pa,
TP_ARGS(sb, pa),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( __u64, pa_pstart )
__field( __u32, pa_len )
),
TP_fast_assign(
- __entry->dev = sb->s_dev;
+ __entry->dev_major = MAJOR(sb->s_dev);
+ __entry->dev_minor = MINOR(sb->s_dev);
__entry->pa_pstart = pa->pa_pstart;
__entry->pa_len = pa->pa_len;
),
- TP_printk("dev %s pstart %llu len %u",
- jbd2_dev_to_name(__entry->dev), __entry->pa_pstart, __entry->pa_len)
+ TP_printk("dev %d,%d pstart %llu len %u",
+ __entry->dev_major, __entry->dev_minor,
+ __entry->pa_pstart, __entry->pa_len)
);
TRACE_EVENT(ext4_discard_preallocations,
@@ -451,18 +485,21 @@ TRACE_EVENT(ext4_discard_preallocations,
TP_ARGS(inode),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( ino_t, ino )
),
TP_fast_assign(
- __entry->dev = inode->i_sb->s_dev;
+ __entry->dev_major = MAJOR(inode->i_sb->s_dev);
+ __entry->dev_minor = MINOR(inode->i_sb->s_dev);
__entry->ino = inode->i_ino;
),
- TP_printk("dev %s ino %lu",
- jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino)
+ TP_printk("dev %d,%d ino %lu",
+ __entry->dev_major, __entry->dev_minor,
+ (unsigned long) __entry->ino)
);
TRACE_EVENT(ext4_mb_discard_preallocations,
@@ -471,18 +508,20 @@ TRACE_EVENT(ext4_mb_discard_preallocations,
TP_ARGS(sb, needed),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( int, needed )
),
TP_fast_assign(
- __entry->dev = sb->s_dev;
+ __entry->dev_major = MAJOR(sb->s_dev);
+ __entry->dev_minor = MINOR(sb->s_dev);
__entry->needed = needed;
),
- TP_printk("dev %s needed %d",
- jbd2_dev_to_name(__entry->dev), __entry->needed)
+ TP_printk("dev %d,%d needed %d",
+ __entry->dev_major, __entry->dev_minor, __entry->needed)
);
TRACE_EVENT(ext4_request_blocks,
@@ -491,7 +530,8 @@ TRACE_EVENT(ext4_request_blocks,
TP_ARGS(ar),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( ino_t, ino )
__field( unsigned int, flags )
__field( unsigned int, len )
@@ -504,7 +544,8 @@ TRACE_EVENT(ext4_request_blocks,
),
TP_fast_assign(
- __entry->dev = ar->inode->i_sb->s_dev;
+ __entry->dev_major = MAJOR(ar->inode->i_sb->s_dev);
+ __entry->dev_minor = MINOR(ar->inode->i_sb->s_dev);
__entry->ino = ar->inode->i_ino;
__entry->flags = ar->flags;
__entry->len = ar->len;
@@ -516,8 +557,9 @@ TRACE_EVENT(ext4_request_blocks,
__entry->pright = ar->pright;
),
- TP_printk("dev %s ino %lu flags %u len %u lblk %llu goal %llu lleft %llu lright %llu pleft %llu pright %llu ",
- jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino,
+ TP_printk("dev %d,%d ino %lu flags %u len %u lblk %llu goal %llu lleft %llu lright %llu pleft %llu pright %llu ",
+ __entry->dev_major, __entry->dev_minor,
+ (unsigned long) __entry->ino,
__entry->flags, __entry->len,
(unsigned long long) __entry->logical,
(unsigned long long) __entry->goal,
@@ -533,7 +575,8 @@ TRACE_EVENT(ext4_allocate_blocks,
TP_ARGS(ar, block),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( ino_t, ino )
__field( __u64, block )
__field( unsigned int, flags )
@@ -547,7 +590,8 @@ TRACE_EVENT(ext4_allocate_blocks,
),
TP_fast_assign(
- __entry->dev = ar->inode->i_sb->s_dev;
+ __entry->dev_major = MAJOR(ar->inode->i_sb->s_dev);
+ __entry->dev_minor = MINOR(ar->inode->i_sb->s_dev);
__entry->ino = ar->inode->i_ino;
__entry->block = block;
__entry->flags = ar->flags;
@@ -560,9 +604,10 @@ TRACE_EVENT(ext4_allocate_blocks,
__entry->pright = ar->pright;
),
- TP_printk("dev %s ino %lu flags %u len %u block %llu lblk %llu goal %llu lleft %llu lright %llu pleft %llu pright %llu ",
- jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino,
- __entry->flags, __entry->len, __entry->block,
+ TP_printk("dev %d,%d ino %lu flags %u len %u block %llu lblk %llu goal %llu lleft %llu lright %llu pleft %llu pright %llu ",
+ __entry->dev_major, __entry->dev_minor,
+ (unsigned long) __entry->ino, __entry->flags,
+ __entry->len, __entry->block,
(unsigned long long) __entry->logical,
(unsigned long long) __entry->goal,
(unsigned long long) __entry->lleft,
@@ -578,7 +623,8 @@ TRACE_EVENT(ext4_free_blocks,
TP_ARGS(inode, block, count, flags),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( ino_t, ino )
__field( umode_t, mode )
__field( __u64, block )
@@ -587,7 +633,8 @@ TRACE_EVENT(ext4_free_blocks,
),
TP_fast_assign(
- __entry->dev = inode->i_sb->s_dev;
+ __entry->dev_major = MAJOR(inode->i_sb->s_dev);
+ __entry->dev_minor = MINOR(inode->i_sb->s_dev);
__entry->ino = inode->i_ino;
__entry->mode = inode->i_mode;
__entry->block = block;
@@ -595,8 +642,9 @@ TRACE_EVENT(ext4_free_blocks,
__entry->flags = flags;
),
- TP_printk("dev %s ino %lu mode 0%o block %llu count %lu flags %d",
- jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino,
+ TP_printk("dev %d,%d ino %lu mode 0%o block %llu count %lu flags %d",
+ __entry->dev_major, __entry->dev_minor,
+ (unsigned long) __entry->ino,
__entry->mode, __entry->block, __entry->count,
__entry->flags)
);
@@ -607,7 +655,8 @@ TRACE_EVENT(ext4_sync_file,
TP_ARGS(file, datasync),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( ino_t, ino )
__field( ino_t, parent )
__field( int, datasync )
@@ -616,14 +665,16 @@ TRACE_EVENT(ext4_sync_file,
TP_fast_assign(
struct dentry *dentry = file->f_path.dentry;
- __entry->dev = dentry->d_inode->i_sb->s_dev;
+ __entry->dev_major = MAJOR(dentry->d_inode->i_sb->s_dev);
+ __entry->dev_minor = MINOR(dentry->d_inode->i_sb->s_dev);
__entry->ino = dentry->d_inode->i_ino;
__entry->datasync = datasync;
__entry->parent = dentry->d_parent->d_inode->i_ino;
),
- TP_printk("dev %s ino %ld parent %ld datasync %d ",
- jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino,
+ TP_printk("dev %d,%d ino %ld parent %ld datasync %d ",
+ __entry->dev_major, __entry->dev_minor,
+ (unsigned long) __entry->ino,
(unsigned long) __entry->parent, __entry->datasync)
);
@@ -633,18 +684,20 @@ TRACE_EVENT(ext4_sync_fs,
TP_ARGS(sb, wait),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( int, wait )
),
TP_fast_assign(
- __entry->dev = sb->s_dev;
+ __entry->dev_major = MAJOR(sb->s_dev);
+ __entry->dev_minor = MINOR(sb->s_dev);
__entry->wait = wait;
),
- TP_printk("dev %s wait %d", jbd2_dev_to_name(__entry->dev),
- __entry->wait)
+ TP_printk("dev %d,%d wait %d", __entry->dev_major,
+ __entry->dev_minor, __entry->wait)
);
TRACE_EVENT(ext4_alloc_da_blocks,
@@ -653,21 +706,24 @@ TRACE_EVENT(ext4_alloc_da_blocks,
TP_ARGS(inode),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( ino_t, ino )
__field( unsigned int, data_blocks )
__field( unsigned int, meta_blocks )
),
TP_fast_assign(
- __entry->dev = inode->i_sb->s_dev;
+ __entry->dev_major = MAJOR(inode->i_sb->s_dev);
+ __entry->dev_minor = MINOR(inode->i_sb->s_dev);
__entry->ino = inode->i_ino;
__entry->data_blocks = EXT4_I(inode)->i_reserved_data_blocks;
__entry->meta_blocks = EXT4_I(inode)->i_reserved_meta_blocks;
),
- TP_printk("dev %s ino %lu data_blocks %u meta_blocks %u",
- jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino,
+ TP_printk("dev %d,%d ino %lu data_blocks %u meta_blocks %u",
+ __entry->dev_major, __entry->dev_minor,
+ (unsigned long) __entry->ino,
__entry->data_blocks, __entry->meta_blocks)
);
@@ -677,7 +733,8 @@ TRACE_EVENT(ext4_mballoc_alloc,
TP_ARGS(ac),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( ino_t, ino )
__field( __u16, found )
__field( __u16, groups )
@@ -700,7 +757,8 @@ TRACE_EVENT(ext4_mballoc_alloc,
),
TP_fast_assign(
- __entry->dev = ac->ac_inode->i_sb->s_dev;
+ __entry->dev_major = MAJOR(ac->ac_inode->i_sb->s_dev);
+ __entry->dev_minor = MINOR(ac->ac_inode->i_sb->s_dev);
__entry->ino = ac->ac_inode->i_ino;
__entry->found = ac->ac_found;
__entry->flags = ac->ac_flags;
@@ -722,10 +780,11 @@ TRACE_EVENT(ext4_mballoc_alloc,
__entry->result_len = ac->ac_f_ex.fe_len;
),
- TP_printk("dev %s inode %lu orig %u/%d/%u@%u goal %u/%d/%u@%u "
+ TP_printk("dev %d,%d inode %lu orig %u/%d/%u@%u goal %u/%d/%u@%u "
"result %u/%d/%u@%u blks %u grps %u cr %u flags 0x%04x "
"tail %u broken %u",
- jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino,
+ __entry->dev_major, __entry->dev_minor,
+ (unsigned long) __entry->ino,
__entry->orig_group, __entry->orig_start,
__entry->orig_len, __entry->orig_logical,
__entry->goal_group, __entry->goal_start,
@@ -743,7 +802,8 @@ TRACE_EVENT(ext4_mballoc_prealloc,
TP_ARGS(ac),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( ino_t, ino )
__field( __u32, orig_logical )
__field( int, orig_start )
@@ -756,7 +816,8 @@ TRACE_EVENT(ext4_mballoc_prealloc,
),
TP_fast_assign(
- __entry->dev = ac->ac_inode->i_sb->s_dev;
+ __entry->dev_major = MAJOR(ac->ac_inode->i_sb->s_dev);
+ __entry->dev_minor = MINOR(ac->ac_inode->i_sb->s_dev);
__entry->ino = ac->ac_inode->i_ino;
__entry->orig_logical = ac->ac_o_ex.fe_logical;
__entry->orig_start = ac->ac_o_ex.fe_start;
@@ -768,8 +829,9 @@ TRACE_EVENT(ext4_mballoc_prealloc,
__entry->result_len = ac->ac_b_ex.fe_len;
),
- TP_printk("dev %s inode %lu orig %u/%d/%u@%u result %u/%d/%u@%u",
- jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino,
+ TP_printk("dev %d,%d inode %lu orig %u/%d/%u@%u result %u/%d/%u@%u",
+ __entry->dev_major, __entry->dev_minor,
+ (unsigned long) __entry->ino,
__entry->orig_group, __entry->orig_start,
__entry->orig_len, __entry->orig_logical,
__entry->result_group, __entry->result_start,
@@ -786,7 +848,8 @@ DECLARE_EVENT_CLASS(ext4__mballoc,
TP_ARGS(sb, inode, group, start, len),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( ino_t, ino )
__field( int, result_start )
__field( __u32, result_group )
@@ -794,15 +857,17 @@ DECLARE_EVENT_CLASS(ext4__mballoc,
),
TP_fast_assign(
- __entry->dev = sb->s_dev;
+ __entry->dev_major = MAJOR(sb->s_dev);
+ __entry->dev_minor = MINOR(sb->s_dev);
__entry->ino = inode ? inode->i_ino : 0;
__entry->result_start = start;
__entry->result_group = group;
__entry->result_len = len;
),
- TP_printk("dev %s inode %lu extent %u/%d/%u ",
- jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino,
+ TP_printk("dev %d,%d inode %lu extent %u/%d/%u ",
+ __entry->dev_major, __entry->dev_minor,
+ (unsigned long) __entry->ino,
__entry->result_group, __entry->result_start,
__entry->result_len)
);
@@ -835,7 +900,8 @@ TRACE_EVENT(ext4_forget,
TP_ARGS(inode, is_metadata, block),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( ino_t, ino )
__field( umode_t, mode )
__field( int, is_metadata )
@@ -843,16 +909,18 @@ TRACE_EVENT(ext4_forget,
),
TP_fast_assign(
- __entry->dev = inode->i_sb->s_dev;
+ __entry->dev_major = MAJOR(inode->i_sb->s_dev);
+ __entry->dev_minor = MINOR(inode->i_sb->s_dev);
__entry->ino = inode->i_ino;
__entry->mode = inode->i_mode;
__entry->is_metadata = is_metadata;
__entry->block = block;
),
- TP_printk("dev %s ino %lu mode 0%o is_metadata %d block %llu",
- jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino,
- __entry->mode, __entry->is_metadata, __entry->block)
+ TP_printk("dev %d,%d ino %lu mode 0%o is_metadata %d block %llu",
+ __entry->dev_major, __entry->dev_minor,
+ (unsigned long) __entry->ino, __entry->mode,
+ __entry->is_metadata, __entry->block)
);
TRACE_EVENT(ext4_da_update_reserve_space,
@@ -861,7 +929,8 @@ TRACE_EVENT(ext4_da_update_reserve_space,
TP_ARGS(inode, used_blocks),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( ino_t, ino )
__field( umode_t, mode )
__field( __u64, i_blocks )
@@ -872,7 +941,8 @@ TRACE_EVENT(ext4_da_update_reserve_space,
),
TP_fast_assign(
- __entry->dev = inode->i_sb->s_dev;
+ __entry->dev_major = MAJOR(inode->i_sb->s_dev);
+ __entry->dev_minor = MINOR(inode->i_sb->s_dev);
__entry->ino = inode->i_ino;
__entry->mode = inode->i_mode;
__entry->i_blocks = inode->i_blocks;
@@ -882,9 +952,10 @@ TRACE_EVENT(ext4_da_update_reserve_space,
__entry->allocated_meta_blocks = EXT4_I(inode)->i_allocated_meta_blocks;
),
- TP_printk("dev %s ino %lu mode 0%o i_blocks %llu used_blocks %d reserved_data_blocks %d reserved_meta_blocks %d allocated_meta_blocks %d",
- jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino,
- __entry->mode, (unsigned long long) __entry->i_blocks,
+ TP_printk("dev %d,%d ino %lu mode 0%o i_blocks %llu used_blocks %d reserved_data_blocks %d reserved_meta_blocks %d allocated_meta_blocks %d",
+ __entry->dev_major, __entry->dev_minor,
+ (unsigned long) __entry->ino, __entry->mode,
+ (unsigned long long) __entry->i_blocks,
__entry->used_blocks, __entry->reserved_data_blocks,
__entry->reserved_meta_blocks, __entry->allocated_meta_blocks)
);
@@ -895,7 +966,8 @@ TRACE_EVENT(ext4_da_reserve_space,
TP_ARGS(inode, md_needed),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( ino_t, ino )
__field( umode_t, mode )
__field( __u64, i_blocks )
@@ -905,7 +977,8 @@ TRACE_EVENT(ext4_da_reserve_space,
),
TP_fast_assign(
- __entry->dev = inode->i_sb->s_dev;
+ __entry->dev_major = MAJOR(inode->i_sb->s_dev);
+ __entry->dev_minor = MINOR(inode->i_sb->s_dev);
__entry->ino = inode->i_ino;
__entry->mode = inode->i_mode;
__entry->i_blocks = inode->i_blocks;
@@ -914,8 +987,9 @@ TRACE_EVENT(ext4_da_reserve_space,
__entry->reserved_meta_blocks = EXT4_I(inode)->i_reserved_meta_blocks;
),
- TP_printk("dev %s ino %lu mode 0%o i_blocks %llu md_needed %d reserved_data_blocks %d reserved_meta_blocks %d",
- jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino,
+ TP_printk("dev %d,%d ino %lu mode 0%o i_blocks %llu md_needed %d reserved_data_blocks %d reserved_meta_blocks %d",
+ __entry->dev_major, __entry->dev_minor,
+ (unsigned long) __entry->ino,
__entry->mode, (unsigned long long) __entry->i_blocks,
__entry->md_needed, __entry->reserved_data_blocks,
__entry->reserved_meta_blocks)
@@ -927,7 +1001,8 @@ TRACE_EVENT(ext4_da_release_space,
TP_ARGS(inode, freed_blocks),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( ino_t, ino )
__field( umode_t, mode )
__field( __u64, i_blocks )
@@ -938,7 +1013,8 @@ TRACE_EVENT(ext4_da_release_space,
),
TP_fast_assign(
- __entry->dev = inode->i_sb->s_dev;
+ __entry->dev_major = MAJOR(inode->i_sb->s_dev);
+ __entry->dev_minor = MINOR(inode->i_sb->s_dev);
__entry->ino = inode->i_ino;
__entry->mode = inode->i_mode;
__entry->i_blocks = inode->i_blocks;
@@ -948,8 +1024,9 @@ TRACE_EVENT(ext4_da_release_space,
__entry->allocated_meta_blocks = EXT4_I(inode)->i_allocated_meta_blocks;
),
- TP_printk("dev %s ino %lu mode 0%o i_blocks %llu freed_blocks %d reserved_data_blocks %d reserved_meta_blocks %d allocated_meta_blocks %d",
- jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino,
+ TP_printk("dev %d,%d ino %lu mode 0%o i_blocks %llu freed_blocks %d reserved_data_blocks %d reserved_meta_blocks %d allocated_meta_blocks %d",
+ __entry->dev_major, __entry->dev_minor,
+ (unsigned long) __entry->ino,
__entry->mode, (unsigned long long) __entry->i_blocks,
__entry->freed_blocks, __entry->reserved_data_blocks,
__entry->reserved_meta_blocks, __entry->allocated_meta_blocks)
@@ -961,18 +1038,20 @@ DECLARE_EVENT_CLASS(ext4__bitmap_load,
TP_ARGS(sb, group),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( __u32, group )
),
TP_fast_assign(
- __entry->dev = sb->s_dev;
+ __entry->dev_major = MAJOR(sb->s_dev);
+ __entry->dev_minor = MINOR(sb->s_dev);
__entry->group = group;
),
- TP_printk("dev %s group %u",
- jbd2_dev_to_name(__entry->dev), __entry->group)
+ TP_printk("dev %d,%d group %u",
+ __entry->dev_major, __entry->dev_minor, __entry->group)
);
DEFINE_EVENT(ext4__bitmap_load, ext4_mb_bitmap_load,
diff --git a/include/trace/events/jbd2.h b/include/trace/events/jbd2.h
index bf16545..7447ea9 100644
--- a/include/trace/events/jbd2.h
+++ b/include/trace/events/jbd2.h
@@ -17,17 +17,19 @@ TRACE_EVENT(jbd2_checkpoint,
TP_ARGS(journal, result),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( int, result )
),
TP_fast_assign(
- __entry->dev = journal->j_fs_dev->bd_dev;
+ __entry->dev_major = MAJOR(journal->j_fs_dev->bd_dev);
+ __entry->dev_minor = MINOR(journal->j_fs_dev->bd_dev);
__entry->result = result;
),
- TP_printk("dev %s result %d",
- jbd2_dev_to_name(__entry->dev), __entry->result)
+ TP_printk("dev %d,%d result %d",
+ __entry->dev_major, __entry->dev_minor, __entry->result)
);
DECLARE_EVENT_CLASS(jbd2_commit,
@@ -37,20 +39,22 @@ DECLARE_EVENT_CLASS(jbd2_commit,
TP_ARGS(journal, commit_transaction),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( char, sync_commit )
__field( int, transaction )
),
TP_fast_assign(
- __entry->dev = journal->j_fs_dev->bd_dev;
+ __entry->dev_major = MAJOR(journal->j_fs_dev->bd_dev);
+ __entry->dev_minor = MINOR(journal->j_fs_dev->bd_dev);
__entry->sync_commit = commit_transaction->t_synchronous_commit;
__entry->transaction = commit_transaction->t_tid;
),
- TP_printk("dev %s transaction %d sync %d",
- jbd2_dev_to_name(__entry->dev), __entry->transaction,
- __entry->sync_commit)
+ TP_printk("dev %d,%d transaction %d sync %d",
+ __entry->dev_major, __entry->dev_minor,
+ __entry->transaction, __entry->sync_commit)
);
DEFINE_EVENT(jbd2_commit, jbd2_start_commit,
@@ -87,22 +91,24 @@ TRACE_EVENT(jbd2_end_commit,
TP_ARGS(journal, commit_transaction),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( char, sync_commit )
__field( int, transaction )
__field( int, head )
),
TP_fast_assign(
- __entry->dev = journal->j_fs_dev->bd_dev;
+ __entry->dev_major = MAJOR(journal->j_fs_dev->bd_dev);
+ __entry->dev_minor = MINOR(journal->j_fs_dev->bd_dev);
__entry->sync_commit = commit_transaction->t_synchronous_commit;
__entry->transaction = commit_transaction->t_tid;
__entry->head = journal->j_tail_sequence;
),
- TP_printk("dev %s transaction %d sync %d head %d",
- jbd2_dev_to_name(__entry->dev), __entry->transaction,
- __entry->sync_commit, __entry->head)
+ TP_printk("dev %d,%d transaction %d sync %d head %d",
+ __entry->dev_major, __entry->dev_minor,
+ __entry->transaction, __entry->sync_commit, __entry->head)
);
TRACE_EVENT(jbd2_submit_inode_data,
@@ -111,17 +117,20 @@ TRACE_EVENT(jbd2_submit_inode_data,
TP_ARGS(inode),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( ino_t, ino )
),
TP_fast_assign(
- __entry->dev = inode->i_sb->s_dev;
+ __entry->dev_major = MAJOR(inode->i_sb->s_dev);
+ __entry->dev_minor = MINOR(inode->i_sb->s_dev);
__entry->ino = inode->i_ino;
),
- TP_printk("dev %s ino %lu",
- jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino)
+ TP_printk("dev %d,%d ino %lu",
+ __entry->dev_major, __entry->dev_minor,
+ (unsigned long) __entry->ino)
);
TRACE_EVENT(jbd2_run_stats,
@@ -131,7 +140,8 @@ TRACE_EVENT(jbd2_run_stats,
TP_ARGS(dev, tid, stats),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( unsigned long, tid )
__field( unsigned long, wait )
__field( unsigned long, running )
@@ -144,7 +154,8 @@ TRACE_EVENT(jbd2_run_stats,
),
TP_fast_assign(
- __entry->dev = dev;
+ __entry->dev_major = MAJOR(dev);
+ __entry->dev_minor = MINOR(dev);
__entry->tid = tid;
__entry->wait = stats->rs_wait;
__entry->running = stats->rs_running;
@@ -156,9 +167,9 @@ TRACE_EVENT(jbd2_run_stats,
__entry->blocks_logged = stats->rs_blocks_logged;
),
- TP_printk("dev %s tid %lu wait %u running %u locked %u flushing %u "
+ TP_printk("dev %d,%d tid %lu wait %u running %u locked %u flushing %u "
"logging %u handle_count %u blocks %u blocks_logged %u",
- jbd2_dev_to_name(__entry->dev), __entry->tid,
+ __entry->dev_major, __entry->dev_minor, __entry->tid,
jiffies_to_msecs(__entry->wait),
jiffies_to_msecs(__entry->running),
jiffies_to_msecs(__entry->locked),
@@ -175,7 +186,8 @@ TRACE_EVENT(jbd2_checkpoint_stats,
TP_ARGS(dev, tid, stats),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( unsigned long, tid )
__field( unsigned long, chp_time )
__field( __u32, forced_to_close )
@@ -184,7 +196,8 @@ TRACE_EVENT(jbd2_checkpoint_stats,
),
TP_fast_assign(
- __entry->dev = dev;
+ __entry->dev_major = MAJOR(dev);
+ __entry->dev_minor = MINOR(dev);
__entry->tid = tid;
__entry->chp_time = stats->cs_chp_time;
__entry->forced_to_close= stats->cs_forced_to_close;
@@ -192,9 +205,9 @@ TRACE_EVENT(jbd2_checkpoint_stats,
__entry->dropped = stats->cs_dropped;
),
- TP_printk("dev %s tid %lu chp_time %u forced_to_close %u "
+ TP_printk("dev %d,%d tid %lu chp_time %u forced_to_close %u "
"written %u dropped %u",
- jbd2_dev_to_name(__entry->dev), __entry->tid,
+ __entry->dev_major, __entry->dev_minor, __entry->tid,
jiffies_to_msecs(__entry->chp_time),
__entry->forced_to_close, __entry->written, __entry->dropped)
);
@@ -207,7 +220,8 @@ TRACE_EVENT(jbd2_cleanup_journal_tail,
TP_ARGS(journal, first_tid, block_nr, freed),
TP_STRUCT__entry(
- __field( dev_t, dev )
+ __field( int, dev_major )
+ __field( int, dev_minor )
__field( tid_t, tail_sequence )
__field( tid_t, first_tid )
__field(unsigned long, block_nr )
@@ -215,16 +229,18 @@ TRACE_EVENT(jbd2_cleanup_journal_tail,
),
TP_fast_assign(
- __entry->dev = journal->j_fs_dev->bd_dev;
+ __entry->dev_major = MAJOR(journal->j_fs_dev->bd_dev);
+ __entry->dev_minor = MINOR(journal->j_fs_dev->bd_dev);
__entry->tail_sequence = journal->j_tail_sequence;
__entry->first_tid = first_tid;
__entry->block_nr = block_nr;
__entry->freed = freed;
),
- TP_printk("dev %s from %u to %u offset %lu freed %lu",
- jbd2_dev_to_name(__entry->dev), __entry->tail_sequence,
- __entry->first_tid, __entry->block_nr, __entry->freed)
+ TP_printk("dev %d,%d from %u to %u offset %lu freed %lu",
+ __entry->dev_major, __entry->dev_minor,
+ __entry->tail_sequence, __entry->first_tid,
+ __entry->block_nr, __entry->freed)
);
#endif /* _TRACE_JBD2_H */
--
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