Messages in this thread | | | Date | Sat, 8 Jan 2005 09:17:11 -0800 | From | William Lee Irwin III <> | Subject | Re: VM fixes [->used_math to PF_USED_MATH] [6/4] |
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On Sun, Dec 26, 2004 at 11:03:09PM -0800, Andy Isaacson wrote: >> I can't find any authoritative source for that assertion, but google >> supports it: >> http://sources.redhat.com/ml/libc-alpha/2002-09/msg00328.html
On Sun, Jan 02, 2005 at 04:41:48PM +0100, Andrea Arcangeli wrote: > This is a nice reference, thanks for the info (I personally only worked > with ev6 so I probably never run in the exact features and history of > the older chips). > All issues with ev4+smp/preempt and ev5+smp/preempt should be fixed with > the two incremental patches I posted last week that make PF_MEMDIE a > TIF_MEMDIE and used_math a PF_USED_MATH and that fixes the PF_MEMDIE > race that existed on all archs in mainline 2.6 and that AFIK Wli even > managed to reproduce once.
Reproduced only once ever on x86-64, but reliably reproducible on all other 64-bit architectures. 32-bit architectures have resource scalability issues that make the particular exploit I wrote ineffective.
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