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Btrfs: extent_write_locked_range() should attach inode->i_wb

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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.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Chris Mason 2019-07-10 12:28:18 -07:00 committed by David Sterba
parent ec39f7696c
commit dbb70becde
1 changed files with 6 additions and 4 deletions
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10
fs/btrfs/extent_io.c
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@ -4255,6 +4255,7 @@ int extent_write_locked_range(struct inode *inode, u64 start, u64 end,
.no_cgroup_owner = 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))
@ -4269,11 +4270,12 @@ 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;
}