Bug 639412
| Summary: | block: must prevent merges of discard and write requests [rhel-6.0.z] | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | RHEL Program Management <pm-rhel> |
| Component: | kernel | Assignee: | Frantisek Hrbata <fhrbata> |
| Status: | CLOSED ERRATA | QA Contact: | Gris Ge <fge> |
| Severity: | urgent | Docs Contact: | |
| Priority: | urgent | ||
| Version: | 6.1 | CC: | bdonahue, chellwig, coughlan, dhoward, fge, fhrbata, jmoyer, jpirko, kzhang, msnitzer, mzywusko, pcfe, pm-eus, qcai, snagar, syeghiay, vgoyal, yugzhang |
| Target Milestone: | rc | Keywords: | ZStream |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | kernel-2.6.32-71.3.1.el6 | Doc Type: | Bug Fix |
| Doc Text: |
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.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2010-11-10 19:10:43 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 637805 | ||
| Bug Blocks: | |||
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Description
RHEL Program Management
2010-10-01 17:05:23 UTC
in 2.6.32-71.3.1.el6 The bug was found upstream and there is no reproducible test case. 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
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.
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