+++ This bug was initially created as a clone of Bug #442577 +++ Description of problem: Function mark_buffer_dirty() contains SMP-unsafe optimization. If CPU reorders instructions in certain way, it may cause that modified data are not written and filesystem corruption happens. For discussion, see the thread at http://www.uwsg.indiana.edu/hypermail/linux/kernel/0804.0/0854.html There are several possible fixes with different performance and complexity (see the thread), the one that went into upstream kernel is this: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=1be62dc190ebaca331038962c873e7967de6cc4b;hp=4ed919014eb2b591eb8fdd4dd00226a65faddef4 Version-Release number of selected component (if applicable): All How reproducible: Can't be reproduced, was found during source code review. If data corruption because of this bug ever happened, it would be very hard to link the corruption to this problem --- so maybe it would be better to fix the bug preemtively.
This request was evaluated by Red Hat Product Management for inclusion in a Red Hat Enterprise Linux maintenance release. Product Management has requested further review of this request by Red Hat Engineering, for potential inclusion in a Red Hat Enterprise Linux Update release for currently deployed products. This request is not yet committed for inclusion in an Update release.
Updating PM score.
Committed in 78.9.EL . RPMS are available at http://people.redhat.com/vgoyal/rhel4/
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2009-1024.html