From: Lukas Czerner Subject: [PATCH v3 12/18] Revert "ext4: fix fsx truncate failure" Date: Tue, 9 Apr 2013 11:14:21 +0200 Message-ID: <1365498867-27782-13-git-send-email-lczerner@redhat.com> References: <1365498867-27782-1-git-send-email-lczerner@redhat.com> Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, Lukas Czerner To: linux-mm@kvack.org Return-path: In-Reply-To: <1365498867-27782-1-git-send-email-lczerner@redhat.com> Sender: owner-linux-mm@kvack.org List-Id: linux-ext4.vger.kernel.org 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 --- fs/ext4/inode.c | 11 ++--------- 1 files changed, 2 insertions(+), 9 deletions(-) diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 5729d21..d58e13c 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -3920,7 +3920,6 @@ 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 @@ -3964,14 +3963,8 @@ 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 -- 1.7.7.6 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org