[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [xen] double fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
On Wed, Oct 9, 2013 at 7:23 PM, Dave Airlie <airlied@xxxxxxxx> wrote: > > Well the commit that added it had a reason that seems to cover some other > device model abuses, so maybe someone who actually understands the device > model (all 2 people) can review usage Actually, I think it's the same bug. You *cannot* just reuse the storage. Doing a "memset()" doesn't improve anything. The basic issue is that if you reuse it, you're buggy. End of story. Why? It's refcounted, and it's out of your hands. Reusing it is wrong - because it might still be used. The fact that you "released" it is immaterial. Others can have refcounts (and through /sys etc, historically really do have them). Linus _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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