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Btrfs: fix a comment in inode.c:evict_inode_truncate_pages() 

The comment was not correct about the part where it says the endio
callback of the bio might have not yet been called - update it
to mention that by that time the endio callback execution might
still be in progress only.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Chris Mason <clm@fb.com>
This commit is contained in:
Filipe Manana 2015-06-10 12:55:41 +01:00 committed by Chris Mason
parent 61de718fce
commit 9c6429d96d
1 changed files with 3 additions and 2 deletions
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fs/btrfs/inode.c
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@ -4989,8 +4989,9 @@ static void evict_inode_truncate_pages(struct inode *inode)
/*
* Keep looping until we have no more ranges in the io tree.
* We can have ongoing bios started by readpages (called from readahead)
* that didn't get their end io callbacks called yet or they are still
* in progress ((extent_io.c:end_bio_extent_readpage()). This means some
* that have their endio callback (extent_io.c:end_bio_extent_readpage)
* still in progress (unlocked the pages in the bio but did not yet
* unlocked the ranges in the io tree). Therefore this means some
* ranges can still be locked and eviction started because before
* submitting those bios, which are executed by a separate task (work
* queue kthread), inode references (inode->i_count) were not taken