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[PATCH] splice: partial write fix 

Currently if partial write has happened while ->commit_write() then page
wasn't marked as accessed and rebalanced.

Signed-off-by: Monakhov Dmitriy <dmonakhov@openvz.org>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Dmitriy Monakhov 2007-03-29 14:24:09 +02:00 committed by Jens Axboe
parent 190a4408ec
commit d9993c37ef
1 changed files with 16 additions and 9 deletions
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25
fs/splice.c
View File

@ -627,18 +627,25 @@ static int pipe_to_file(struct pipe_inode_info *pipe, struct pipe_buffer *buf,
}
ret = mapping->a_ops->commit_write(file, page, offset, offset+this_len);
if (!ret) {
if (ret) {
if (ret == AOP_TRUNCATED_PAGE) {
page_cache_release(page);
goto find_page;
}
if (ret < 0)
goto out;
/*
* Return the number of bytes written and mark page as
* accessed, we are now done!
* Partial write has happened, so 'ret' already initialized by
* number of bytes written, Where is nothing we have to do here.
*/
} else
ret = this_len;
mark_page_accessed(page);
balance_dirty_pages_ratelimited(mapping);
} else if (ret == AOP_TRUNCATED_PAGE) {
page_cache_release(page);
goto find_page;
}
/*
* Return the number of bytes written and mark page as
* accessed, we are now done!
*/
mark_page_accessed(page);
balance_dirty_pages_ratelimited(mapping);
out:
page_cache_release(page);
unlock_page(page);