From eb3544c6fc6642c9037817980d8a9dc9df44aa45 Mon Sep 17 00:00:00 2001 From: Lukas Czerner Date: Mon, 27 May 2013 23:32:35 -0400 Subject: [PATCH] Revert "ext4: fix fsx truncate failure" This reverts commit 189e868fa8fdca702eb9db9d8afc46b5cb9144c9. This commit reintroduces the use of ext4_block_truncate_page() in ext4 truncate operation instead of ext4_discard_partial_page_buffers(). The statement in the commit description that the truncate operation only zero block unaligned portion of the last page is not exactly right, since truncate_pagecache_range() also zeroes and invalidate the unaligned portion of the page. Then there is no need to zero and unmap it once more and ext4_block_truncate_page() was doing the right job, although we still need to update the buffer head containing the last block, which is exactly what ext4_block_truncate_page() is doing. Moreover the problem described in the commit is fixed more properly with commit 15291164b22a357cb211b618adfef4fa82fc0de3 jbd2: clear BH_Delay & BH_Unwritten in journal_unmap_buffer This was tested on ppc64 machine with block size of 1024 bytes without any problems. Signed-off-by: Lukas Czerner Reviewed-by: Jan Kara Signed-off-by: Theodore Ts'o --- fs/ext4/inode.c | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-) diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index e3d0fb9e78c4..a7f6b3194467 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -3938,7 +3938,6 @@ void ext4_truncate(struct inode *inode) unsigned int credits; handle_t *handle; struct address_space *mapping = inode->i_mapping; - loff_t page_len; /* * There is a possibility that we're either freeing the inode @@ -3982,14 +3981,8 @@ void ext4_truncate(struct inode *inode) return; } - if (inode->i_size % PAGE_CACHE_SIZE != 0) { - page_len = PAGE_CACHE_SIZE - - (inode->i_size & (PAGE_CACHE_SIZE - 1)); - - if (ext4_discard_partial_page_buffers(handle, - mapping, inode->i_size, page_len, 0)) - goto out_stop; - } + if (inode->i_size & (inode->i_sb->s_blocksize - 1)) + ext4_block_truncate_page(handle, mapping, inode->i_size); /* * We add the inode to the orphan list, so that if this -- 2.20.1