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Bug#613634: [PATCH] vmalloc: eagerly clear ptes on vunmap

On Sun, 2011-05-01 at 16:51 +0100, Ben Hutchings wrote:
> On Sun, 2011-05-01 at 12:33 +0100, Ian Campbell wrote:
> > On Sat, 2011-04-30 at 17:34 +0100, Ben Hutchings wrote:
> > > Ian, should we apply the backport from
> > > 64141da587241301ce8638cc945f8b67853156ec to squeeze for bug #613634 et
> > > al?
> > 
> > It's already in SVN for 2.6.32-34, seems to be in the changelog twice
> > even, once closing #614400 and then again closing #613634, which are
> > merged.
> Oh right, it's applied to the xen-featureset kernels.

So it is, I'd forgotten that.

> But isn't it also
> applicable to non-xen-featureset kernels which can run in domU?

Yes. I initially confused it with the vmalloc_sync_all fixes which
really only impact domains running backend drivers (since that's the
only real user of that code path). The vunmap thing is indeed more
generically useful to fix so I think it should go into the generic
flavours too.

Want me to take a look at that?


Ian Campbell

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