adulau/aha
1
0
Fork 0
mirror of https://github.com/adulau/aha.git synced 2024-12-28 11:46:19 +00:00
Code Issues Projects Releases Packages Wiki Activity

writeback: pass in super_block to bdi_start_writeback()

Browse source 
Sometimes we only want to write pages from a specific super_block,
so allow that to be passed in.

This fixes a problem with commit 56a131dcf7
causing writeback on all super_blocks on a bdi, where we only really
want to sync a specific sb from writeback_inodes_sb().

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Jens Axboe 2009-09-26 00:07:46 +02:00
parent 6d7f18f6ea
commit a72bfd4dea
3 changed files with 7 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
fs/fs-writeback.c
View file

@ -250,9 +250,11 @@ static void bdi_sync_writeback(struct backing_dev_info *bdi,
* completion. Caller need not hold sb s_umount semaphore. * completion. Caller need not hold sb s_umount semaphore.
* *
*/ */
void bdi_start_writeback(struct backing_dev_info *bdi, long nr_pages) void bdi_start_writeback(struct backing_dev_info *bdi, struct super_block *sb,
long nr_pages)
{ {
struct wb_writeback_args args = { struct wb_writeback_args args = {
.sb = sb,
.sync_mode = WB_SYNC_NONE, .sync_mode = WB_SYNC_NONE,
.nr_pages = nr_pages, .nr_pages = nr_pages,
.range_cyclic = 1, .range_cyclic = 1,
@ -1206,7 +1208,7 @@ void writeback_inodes_sb(struct super_block *sb)
nr_to_write = nr_dirty + nr_unstable + nr_to_write = nr_dirty + nr_unstable +
(inodes_stat.nr_inodes - inodes_stat.nr_unused); (inodes_stat.nr_inodes - inodes_stat.nr_unused);
bdi_start_writeback(sb->s_bdi, nr_to_write); bdi_start_writeback(sb->s_bdi, sb, nr_to_write);
} }
EXPORT_SYMBOL(writeback_inodes_sb); EXPORT_SYMBOL(writeback_inodes_sb);

3
include/linux/backing-dev.h
View file

@ -101,7 +101,8 @@ int bdi_register(struct backing_dev_info *bdi, struct device *parent,
const char *fmt, ...); const char *fmt, ...);
int bdi_register_dev(struct backing_dev_info *bdi, dev_t dev); int bdi_register_dev(struct backing_dev_info *bdi, dev_t dev);
void bdi_unregister(struct backing_dev_info *bdi); void bdi_unregister(struct backing_dev_info *bdi);
void bdi_start_writeback(struct backing_dev_info *bdi, long nr_pages); void bdi_start_writeback(struct backing_dev_info *bdi, struct super_block *sb,
long nr_pages);
int bdi_writeback_task(struct bdi_writeback *wb); int bdi_writeback_task(struct bdi_writeback *wb);
int bdi_has_dirty_io(struct backing_dev_info *bdi); int bdi_has_dirty_io(struct backing_dev_info *bdi);

2
mm/page-writeback.c
View file

@ -596,7 +596,7 @@ static void balance_dirty_pages(struct address_space *mapping,
(!laptop_mode && ((global_page_state(NR_FILE_DIRTY) (!laptop_mode && ((global_page_state(NR_FILE_DIRTY)
+ global_page_state(NR_UNSTABLE_NFS)) + global_page_state(NR_UNSTABLE_NFS))
> background_thresh))) > background_thresh)))
bdi_start_writeback(bdi, 0); bdi_start_writeback(bdi, NULL, 0);
} }
void set_page_dirty_balance(struct page *page, int page_mkwrite) void set_page_dirty_balance(struct page *page, int page_mkwrite)