From: Chris Mason <clm@xxxxxx>
extent_write_locked_range() is used when we're falling back to buffered
IO from inside of compression. It allocates its own wbc and should
associate it with the inode's i_wb to make sure the IO goes down from
the correct cgroup.
Signed-off-by: Chris Mason <clm@xxxxxx>
---
fs/btrfs/extent_io.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index d7b57341ff1a..afb916a69c30 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -4180,6 +4180,7 @@ int extent_write_locked_range(struct inode *inode, u64 start, u64 end,
.no_wbc_acct = 1,
};
+ wbc_attach_fdatawrite_inode(&wbc_writepages, inode);
while (start <= end) {
page = find_get_page(mapping, start >> PAGE_SHIFT);
if (clear_page_dirty_for_io(page))
@@ -4194,11 +4195,12 @@ int extent_write_locked_range(struct inode *inode, u64 start, u64 end,
}
ASSERT(ret <= 0);
- if (ret < 0) {
+ if (ret == 0)
+ ret = flush_write_bio(&epd);
+ else
end_write_bio(&epd, ret);
- return ret;
- }
- ret = flush_write_bio(&epd);
+
+ wbc_detach_inode(&wbc_writepages);
return ret;
}
--
2.17.1
