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ext4: don't keep using page if inline conversion fails

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If inline->extent conversion fails (most probably due to ENOSPC) and
we release the temporary page that we allocated to transfer the file
contents, don't keep using the page pointer after releasing the page.
This occasionally leads to complaints about evicting locked pages or
hangs when blocksize > pagesize, because it's possible for the page to
get reallocated elsewhere in the meantime.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Tao Ma <tm@tao.ma>
This commit is contained in:
Darrick J. Wong 2014-09-11 11:45:12 -04:00 committed by Theodore Ts'o
parent df4763bea5
commit 684de57486
1 changed files with 3 additions and 1 deletions
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4
fs/ext4/inline.c
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@ -594,6 +594,7 @@ retry:
if (ret) {
unlock_page(page);
page_cache_release(page);
page = NULL;
ext4_orphan_add(handle, inode);
up_write(&EXT4_I(inode)->xattr_sem);
sem_held = 0;
@ -613,7 +614,8 @@ retry:
if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
goto retry;
block_commit_write(page, from, to);
if (page)
block_commit_write(page, from, to);
out:
if (page) {
unlock_page(page);