From: Namjae Jeon Date: Fri, 11 Apr 2014 02:58:20 +0000 (-0400) Subject: ext4: fix COLLAPSE_RANGE test failure in data journalling mode X-Git-Tag: omap-for-v3.16/pm-signed~66^2~24 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1ce01c4a199c50b023802be25261c0c02b2f0214;p=pandora-kernel.git ext4: fix COLLAPSE_RANGE test failure in data journalling mode When mounting ext4 with data=journal option, xfstest shared/002 and shared/004 are currently failing as checksum computed for testfile does not match with the checksum computed in other journal modes. In case of data=journal mode, a call to filemap_write_and_wait_range will not flush anything to disk as buffers are not marked dirty in write_end. In collapse range this call is followed by a call to truncate_pagecache_range. Due to this, when checksum is computed, a portion of file is re-read from disk which replace valid data with NULL bytes and hence the reason for the difference in checksum. Calling ext4_force_commit before filemap_write_and_wait_range solves the issue as it will mark the buffers dirty during commit transaction which can be later synced by a call to filemap_write_and_wait_range. Signed-off-by: Namjae Jeon Signed-off-by: Ashish Sangwan Signed-off-by: "Theodore Ts'o" --- Reading git-diff-tree failed