diff options
author | Curt Wohlgemuth <curtw@google.com> | 2011-10-07 23:54:10 -0400 |
---|---|---|
committer | Wu Fengguang <fengguang.wu@intel.com> | 2011-10-30 12:33:36 -0400 |
commit | 0e175a1835ffc979e55787774e58ec79e41957d7 (patch) | |
tree | 6ec4b65a8de4e9d1c12d26a1079079ed81d79450 /fs/btrfs/extent-tree.c | |
parent | ad4e38dd6a33bb3a4882c487d7abe621e583b982 (diff) |
writeback: Add a 'reason' to wb_writeback_work
This creates a new 'reason' field in a wb_writeback_work
structure, which unambiguously identifies who initiates
writeback activity. A 'wb_reason' enumeration has been
added to writeback.h, to enumerate the possible reasons.
The 'writeback_work_class' and tracepoint event class and
'writeback_queue_io' tracepoints are updated to include the
symbolic 'reason' in all trace events.
And the 'writeback_inodes_sbXXX' family of routines has had
a wb_stats parameter added to them, so callers can specify
why writeback is being started.
Acked-by: Jan Kara <jack@suse.cz>
Signed-off-by: Curt Wohlgemuth <curtw@google.com>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Diffstat (limited to 'fs/btrfs/extent-tree.c')
-rw-r--r-- | fs/btrfs/extent-tree.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index f5be06a2462f..c9ee0e18bbdc 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c | |||
@@ -3340,7 +3340,8 @@ static int shrink_delalloc(struct btrfs_trans_handle *trans, | |||
3340 | smp_mb(); | 3340 | smp_mb(); |
3341 | nr_pages = min_t(unsigned long, nr_pages, | 3341 | nr_pages = min_t(unsigned long, nr_pages, |
3342 | root->fs_info->delalloc_bytes >> PAGE_CACHE_SHIFT); | 3342 | root->fs_info->delalloc_bytes >> PAGE_CACHE_SHIFT); |
3343 | writeback_inodes_sb_nr_if_idle(root->fs_info->sb, nr_pages); | 3343 | writeback_inodes_sb_nr_if_idle(root->fs_info->sb, nr_pages, |
3344 | WB_REASON_FS_FREE_SPACE); | ||
3344 | 3345 | ||
3345 | spin_lock(&space_info->lock); | 3346 | spin_lock(&space_info->lock); |
3346 | if (reserved > space_info->bytes_reserved) | 3347 | if (reserved > space_info->bytes_reserved) |