Messages in this thread | | | Date | Fri, 28 Mar 2008 11:02:34 -0700 | From | Jeremy Fitzhardinge <> | Subject | Re: [PATCH 0/3] xen: Fix oops when mapping/unmapping addr above 1Gb |
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Mark McLoughlin wrote: > Hi, > In Fedora rawhide we're currently seeing oopses whenever > a processes dlopen()s a library which prelink() has previously > relocated above 1Gb. Some more details at: > > https://bugzilla.redhat.com/436453 > > The issue seems to be that during xen_pgd_pin(), we only > pin PTE pages, but xen's release_pmd() tries to unpin PMD pages > too. > > The following series of patches is against the latest > x86 tree. >
Hm, OK. I'm trying to work out what happened here. I guess its a latent bug which is only visible now that its possible to incrementally free pmds.
A side note is that I'm planning on pinning pmds in the future, so that we can get away replace the full pgd page per mm with a pgd page per cpu.
J
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