xen-devel
[Xen-devel] Re: [PATCH 0/3] xen: Fix oops when mapping/unmapping addr ab
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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