Red Hat Bugzilla – Full Text Bug Listing
|Summary:||block: must prevent merges of discard and write requests [rhel-6.0.z]|
|Product:||Red Hat Enterprise Linux 6||Reporter:||RHEL Product and Program Management <pm-rhel>|
|Component:||kernel||Assignee:||Frantisek Hrbata <fhrbata>|
|Status:||CLOSED ERRATA||QA Contact:||Gris Ge <fge>|
|Version:||6.1||CC:||bdonahue, caiqian, chellwig, coughlan, dhoward, fge, fhrbata, jmoyer, jpirko, kzhang, msnitzer, mzywusko, pcfe, pm-eus, snagar, syeghiay, vgoyal, yugzhang|
|Fixed In Version:||kernel-2.6.32-71.3.1.el6||Doc Type:||Bug Fix|
Previously, a write request may have merged with a discard request. This could have posed a potential risk for 3rd party drivers which could possibly issue a discard without waiting properly. With this update, discarding of write block I/O requests by preventing merges of discard and write requests in one block I/O has been introduced, thus, resolving the possible risks.
|Last Closed:||2010-11-10 14:10:43 EST||Type:||---|
|oVirt Team:||---||RHEL 7.3 requirements from Atomic Host:|
|Bug Depends On:||637805|
Description RHEL Product and Program Management 2010-10-01 13:05:23 EDT
This bug has been copied from bug #637805 and has been proposed to be backported to 6.0 z-stream (EUS).
Comment 2 Frantisek Hrbata 2010-10-04 03:14:37 EDT
Comment 5 Barry Donahue 2010-10-21 10:58:06 EDT
The bug was found upstream and there is no reproducible test case.
Comment 7 errata-xmlrpc 2010-11-10 14:10:43 EST
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-2010-0842.html
Comment 8 Martin Prpic 2010-11-11 06:55:06 EST
Technical note added. If any revisions are required, please edit the "Technical Notes" field accordingly. All revisions will be proofread by the Engineering Content Services team. New Contents: Previously, a write request may have merged with a discard request. This could have posed a potential risk for 3rd party drivers which could possibly issue a discard without waiting properly. With this update, discarding of write block I/O requests by preventing merges of discard and write requests in one block I/O has been introduced, thus, resolving the possible risks.