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Date: Fri, 1 Aug 2008 00:49:59 +0200
From: Andrea Righi <righi.andrea@...il.com>
To: akpm@...ux-foundation.org, balbir@...ux.vnet.ibm.com
Cc: Matt Heaton <matt@...ehost.com>, Mark Seger <Mark.Seger@...com>,
Oleg Nesterov <oleg@...sign.ru>, linux-kernel@...r.kernel.org,
Andrea Righi <righi.andrea@...il.com>
Subject: [PATCH -mm 4/4] per block device IO accounting instrumentation
Use the new block device i/o accounting functions.
Signed-off-by: Andrea Righi <righi.andrea@...il.com>
---
block/blk-core.c | 2 +-
fs/buffer.c | 10 +++++++++-
fs/cifs/file.c | 2 +-
fs/direct-io.c | 3 ++-
kernel/exit.c | 16 +++++++++++++---
kernel/fork.c | 7 ++++---
mm/page-writeback.c | 9 ++++++++-
mm/readahead.c | 5 ++++-
mm/truncate.c | 9 +++++++--
9 files changed, 49 insertions(+), 14 deletions(-)
diff --git a/block/blk-core.c b/block/blk-core.c
index fef79cc..3f7daf0 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1478,7 +1478,7 @@ void submit_bio(int rw, struct bio *bio)
if (rw & WRITE) {
count_vm_events(PGPGOUT, count);
} else {
- task_io_account_read(bio->bi_size);
+ task_io_account_read(bio->bi_bdev, bio->bi_size);
count_vm_events(PGPGIN, count);
}
diff --git a/fs/buffer.c b/fs/buffer.c
index 9749a90..b7647ab 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -708,6 +708,8 @@ EXPORT_SYMBOL(mark_buffer_dirty_inode);
static int __set_page_dirty(struct page *page,
struct address_space *mapping, int warn)
{
+ size_t io_acct = 0;
+
if (unlikely(!mapping))
return !TestSetPageDirty(page);
@@ -722,13 +724,19 @@ static int __set_page_dirty(struct page *page,
__inc_zone_page_state(page, NR_FILE_DIRTY);
__inc_bdi_stat(mapping->backing_dev_info,
BDI_RECLAIMABLE);
- task_io_account_write(PAGE_CACHE_SIZE);
+ io_acct = PAGE_CACHE_SIZE;
}
radix_tree_tag_set(&mapping->page_tree,
page_index(page), PAGECACHE_TAG_DIRTY);
}
spin_unlock_irq(&mapping->tree_lock);
__mark_inode_dirty(mapping->host, I_DIRTY_PAGES);
+ if (io_acct) {
+ struct block_device *bdev = (mapping->host &&
+ mapping->host->i_sb->s_bdev) ?
+ mapping->host->i_sb->s_bdev : NULL;
+ task_io_account_write(bdev, io_acct);
+ }
return 1;
}
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 9b8a893..6e80927 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1872,7 +1872,7 @@ static int cifs_readpages(struct file *file, struct address_space *mapping,
cFYI(1, ("Read error in readpages: %d", rc));
break;
} else if (bytes_read > 0) {
- task_io_account_read(bytes_read);
+ task_io_account_read(NULL, bytes_read);
pSMBr = (struct smb_com_read_rsp *)smb_read_data;
cifs_copy_cache_pages(mapping, page_list, bytes_read,
smb_read_data + 4 /* RFC1001 hdr */ +
diff --git a/fs/direct-io.c b/fs/direct-io.c
index 9606ee8..1e82a05 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -660,7 +660,8 @@ submit_page_section(struct dio *dio, struct page *page,
/*
* Read accounting is performed in submit_bio()
*/
- task_io_account_write(len);
+ struct block_device *bdev = dio->bio ? dio->bio->bi_bdev : NULL;
+ task_io_account_write(bdev, len);
}
/*
diff --git a/kernel/exit.c b/kernel/exit.c
index c446b84..428d7b1 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -121,7 +121,10 @@ static void __exit_signal(struct task_struct *tsk)
sig->nivcsw += tsk->nivcsw;
sig->inblock += task_io_get_inblock(tsk);
sig->oublock += task_io_get_oublock(tsk);
- task_io_accounting_add(&sig->ioac, &tsk->ioac);
+
+ task_io_account_add(&sig->ioac, &tsk->ioac);
+ task_io_account_merge_stat(&sig->ioac, &tsk->ioac);
+
sig->sum_sched_runtime += tsk->se.sum_exec_runtime;
sig = NULL; /* Marker for below. */
}
@@ -1346,9 +1349,16 @@ static int wait_task_zombie(struct task_struct *p, int options,
psig->coublock +=
task_io_get_oublock(p) +
sig->oublock + sig->coublock;
- task_io_accounting_add(&psig->ioac, &p->ioac);
- task_io_accounting_add(&psig->ioac, &sig->ioac);
+
+ task_io_account_add(&psig->ioac, &p->ioac);
+ task_io_account_add(&psig->ioac, &sig->ioac);
+ task_io_account_merge_stat(&psig->ioac, &p->ioac);
+ task_io_account_merge_stat(&psig->ioac, &sig->ioac);
+
spin_unlock_irq(&p->parent->sighand->siglock);
+ } else {
+ task_io_account_cleanup(&p->signal->ioac);
+ task_io_account_cleanup(&p->ioac);
}
/*
diff --git a/kernel/fork.c b/kernel/fork.c
index 63a87ff..c72c376 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -826,7 +826,9 @@ static int copy_signal(unsigned long clone_flags, struct task_struct *tsk)
sig->nvcsw = sig->nivcsw = sig->cnvcsw = sig->cnivcsw = 0;
sig->min_flt = sig->maj_flt = sig->cmin_flt = sig->cmaj_flt = 0;
sig->inblock = sig->oublock = sig->cinblock = sig->coublock = 0;
- task_io_accounting_init(&sig->ioac);
+
+ task_io_account_init(&sig->ioac);
+
sig->sum_sched_runtime = 0;
INIT_LIST_HEAD(&sig->cpu_timers[0]);
INIT_LIST_HEAD(&sig->cpu_timers[1]);
@@ -1008,8 +1010,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
p->last_switch_count = 0;
p->last_switch_timestamp = 0;
#endif
-
- task_io_accounting_init(&p->ioac);
+ task_io_account_init(&p->ioac);
acct_clear_integrals(p);
p->it_virt_expires = cputime_zero;
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index c6d6088..06ec4b2 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -1080,6 +1080,7 @@ int __set_page_dirty_nobuffers(struct page *page)
if (!TestSetPageDirty(page)) {
struct address_space *mapping = page_mapping(page);
struct address_space *mapping2;
+ ssize_t io_acct = 0;
if (!mapping)
return 1;
@@ -1093,7 +1094,7 @@ int __set_page_dirty_nobuffers(struct page *page)
__inc_zone_page_state(page, NR_FILE_DIRTY);
__inc_bdi_stat(mapping->backing_dev_info,
BDI_RECLAIMABLE);
- task_io_account_write(PAGE_CACHE_SIZE);
+ io_acct = PAGE_CACHE_SIZE;
}
radix_tree_tag_set(&mapping->page_tree,
page_index(page), PAGECACHE_TAG_DIRTY);
@@ -1103,6 +1104,12 @@ int __set_page_dirty_nobuffers(struct page *page)
/* !PageAnon && !swapper_space */
__mark_inode_dirty(mapping->host, I_DIRTY_PAGES);
}
+ if (io_acct) {
+ struct block_device *bdev = (mapping->host &&
+ mapping->host->i_sb->s_bdev) ?
+ mapping->host->i_sb->s_bdev : NULL;
+ task_io_account_write(bdev, io_acct);
+ }
return 1;
}
return 0;
diff --git a/mm/readahead.c b/mm/readahead.c
index 137bc56..614f55a 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -58,6 +58,9 @@ int read_cache_pages(struct address_space *mapping, struct list_head *pages,
int (*filler)(void *, struct page *), void *data)
{
struct page *page;
+ struct block_device *bdev =
+ (mapping->host && mapping->host->i_sb->s_bdev) ?
+ mapping->host->i_sb->s_bdev : NULL;
int ret = 0;
while (!list_empty(pages)) {
@@ -75,7 +78,7 @@ int read_cache_pages(struct address_space *mapping, struct list_head *pages,
put_pages_list(pages);
break;
}
- task_io_account_read(PAGE_CACHE_SIZE);
+ task_io_account_read(bdev, PAGE_CACHE_SIZE);
}
return ret;
}
diff --git a/mm/truncate.c b/mm/truncate.c
index 4d129a5..17c42b7 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -76,8 +76,13 @@ void cancel_dirty_page(struct page *page, unsigned int account_size)
dec_zone_page_state(page, NR_FILE_DIRTY);
dec_bdi_stat(mapping->backing_dev_info,
BDI_RECLAIMABLE);
- if (account_size)
- task_io_account_cancelled_write(account_size);
+ if (account_size) {
+ struct block_device *bdev =
+ mapping->host->i_sb->s_bdev ?
+ mapping->host->i_sb->s_bdev : NULL;
+ task_io_account_cancelled_write(bdev,
+ account_size);
+ }
}
}
}
--
1.5.4.3
--
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