Bug 339621 - XFS lazy vunmap behaviour is incompatible with xen
XFS lazy vunmap behaviour is incompatible with xen
Status: CLOSED DUPLICATE of bug 470845
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel-xen (Show other bugs)
5.0
All Linux
low Severity low
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Assigned To: Eric Sandeen
Martin Jenner
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Depends On:
Blocks: 492570
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Reported: 2007-10-19 08:10 EDT by Ian Campbell
Modified: 2009-03-27 10:45 EDT (History)
4 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2009-03-26 09:37:07 EDT
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RHEL 7.3 requirements from Atomic Host:
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Attachments (Terms of Use)
linux-2.6.18-xen 263:9bf1ddd0f6bf ported to 2.6.9-67.EL (2.04 KB, patch)
2007-12-14 04:20 EST, Ian Campbell
no flags Details | Diff
linux-2.6.18-xen 263:9bf1ddd0f6bf ported to 2.6.18-53.el5 (2.04 KB, patch)
2007-12-14 04:21 EST, Ian Campbell
no flags Details | Diff

  None (edit)
Description Ian Campbell 2007-10-19 08:10:57 EDT
Description of problem:

XFS lazily vunmaps, if one of those pages is recylced into a pagetable page
before it is fully unmapped then the extra writable mapping causes the pagetable
to be rejected.

LKML thread: http://marc.info/?l=linux-kernel&m=119220904017315&w=2
Fix in upstream GIT commit 7f015072348a14f16d548be557ee58c5c55df0aa:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=7f015072348a14f16d548be557ee58c5c55df0aa

Also in Xen kernel tree:
http://hg.uk.xensource.com/linux-2.6.18-xen.hg?cs=9bf1ddd0f6bf


Version-Release number of selected component (if applicable):
2.6.18-8.1.14.el5 and 2.6.9-55.0.9.EL
Comment 1 Ian Campbell 2007-12-14 04:20:48 EST
Created attachment 288831 [details]
linux-2.6.18-xen 263:9bf1ddd0f6bf ported to 2.6.9-67.EL
Comment 2 Ian Campbell 2007-12-14 04:21:28 EST
Created attachment 288841 [details]
linux-2.6.18-xen 263:9bf1ddd0f6bf ported to 2.6.18-53.el5
Comment 7 Chris Lalancette 2009-03-26 09:37:07 EDT

*** This bug has been marked as a duplicate of bug 470845 ***

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