From d9993c37ef87c758d4a6e63972395b1cf8a4cb7b Mon Sep 17 00:00:00 2001 From: Dmitriy Monakhov Date: Thu, 29 Mar 2007 14:24:09 +0200 Subject: [PATCH] [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 Cc: Nick Piggin Signed-off-by: Andrew Morton Signed-off-by: Jens Axboe --- fs/splice.c | 25 ++++++++++++++++--------- 1 file changed, 16 insertions(+), 9 deletions(-) diff --git a/fs/splice.c b/fs/splice.c index 07f6556add0a..5428b0ff3b6f 100644 --- a/fs/splice.c +++ b/fs/splice.c @@ -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);