| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Tue, 24 Mar 2015 09:27:01 -0600
From: Jens Axboe <axboe@...com>
To: <axboe@...nel.dk>, <linux-kernel@...r.kernel.org>,
<linux-fsdevel@...r.kernel.org>
CC: <ming.l@....samsung.com>, Jens Axboe <axboe@...com>
Subject: [PATCH 4/6] Add stream ID support for buffered writeback
Add a streamid field to the writeback_control structure, and use
it for the various parts of buffered writeback.
Signed-off-by: Jens Axboe <axboe@...com>
---
fs/buffer.c | 4 ++--
fs/fs-writeback.c | 1 +
fs/mpage.c | 1 +
include/linux/writeback.h | 2 ++
mm/filemap.c | 1 +
mm/migrate.c | 1 +
mm/page-writeback.c | 1 +
mm/vmscan.c | 1 +
8 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/fs/buffer.c b/fs/buffer.c
index 20805db2c987..1ae99868f6fb 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -1774,7 +1774,7 @@ static int __block_write_full_page(struct inode *inode, struct page *page,
do {
struct buffer_head *next = bh->b_this_page;
if (buffer_async_write(bh)) {
- submit_bh(write_op, bh);
+ _submit_bh(write_op, bh, streamid_to_flags(wbc->streamid));
nr_underway++;
}
bh = next;
@@ -1828,7 +1828,7 @@ recover:
struct buffer_head *next = bh->b_this_page;
if (buffer_async_write(bh)) {
clear_buffer_dirty(bh);
- submit_bh(write_op, bh);
+ _submit_bh(write_op, bh, streamid_to_flags(wbc->streamid));
nr_underway++;
}
bh = next;
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index e907052eeadb..0d0a9f6268f5 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -733,6 +733,7 @@ static long writeback_sb_inodes(struct super_block *sb,
* We use I_SYNC to pin the inode in memory. While it is set
* evict_inode() will wait so the inode cannot be freed.
*/
+ wbc.streamid = inode->i_streamid;
__writeback_single_inode(inode, &wbc);
work->nr_pages -= write_chunk - wbc.nr_to_write;
diff --git a/fs/mpage.c b/fs/mpage.c
index 3e79220babac..ae19d35bdd96 100644
--- a/fs/mpage.c
+++ b/fs/mpage.c
@@ -605,6 +605,7 @@ alloc_new:
bio_get_nr_vecs(bdev), GFP_NOFS|__GFP_HIGH);
if (bio == NULL)
goto confused;
+ bio_set_streamid(bio, wbc->streamid);
}
/*
diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index 00048339c23e..3ac2ce545dac 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -78,6 +78,8 @@ struct writeback_control {
enum writeback_sync_modes sync_mode;
+ unsigned int streamid;
+
unsigned for_kupdate:1; /* A kupdate writeback */
unsigned for_background:1; /* A background writeback */
unsigned tagged_writepages:1; /* tag-and-write to avoid livelock */
diff --git a/mm/filemap.c b/mm/filemap.c
index ad7242043bdb..85aa2cc77d67 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -276,6 +276,7 @@ int __filemap_fdatawrite_range(struct address_space *mapping, loff_t start,
struct writeback_control wbc = {
.sync_mode = sync_mode,
.nr_to_write = LONG_MAX,
+ .streamid = inode_streamid(mapping->host),
.range_start = start,
.range_end = end,
};
diff --git a/mm/migrate.c b/mm/migrate.c
index 85e042686031..614407dceb55 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -645,6 +645,7 @@ static int writeout(struct address_space *mapping, struct page *page)
struct writeback_control wbc = {
.sync_mode = WB_SYNC_NONE,
.nr_to_write = 1,
+ .streamid = inode_streamid(mapping->host),
.range_start = 0,
.range_end = LLONG_MAX,
.for_reclaim = 1
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 45e187b2d971..47120abe8afb 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -2051,6 +2051,7 @@ int write_one_page(struct page *page, int wait)
int ret = 0;
struct writeback_control wbc = {
.sync_mode = WB_SYNC_ALL,
+ .streamid = inode_streamid(mapping->host),
.nr_to_write = 1,
};
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 5e8eadd71bac..67fcdd082c17 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -546,6 +546,7 @@ static pageout_t pageout(struct page *page, struct address_space *mapping,
struct writeback_control wbc = {
.sync_mode = WB_SYNC_NONE,
.nr_to_write = SWAP_CLUSTER_MAX,
+ .streamid = inode_streamid(mapping->host),
.range_start = 0,
.range_end = LLONG_MAX,
.for_reclaim = 1,
--
1.9.1
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists