Messages in this thread | | | Date | Wed, 1 Oct 2003 00:00:15 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH] Mutilated form of Andi Kleen's AMD prefetch errata patch |
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Andi Kleen <ak@suse.de> wrote: > > Andrew Morton <akpm@osdl.org> writes: > > > Looking at Andi's patch, it is also a dead box if the fault happens inside > > down_write(mmap_sem). That should be fixed, methinks. > > The only way to fix all that would be to move the instruction checks early > into the fast path.
Well the deadlock avoidance only needs to happen if the fault occured in kernel mode. Presumably most faults are in userspace, so most of the overhead can be avoided.
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