Messages in this thread |  | | | Date | Fri, 07 Mar 2008 04:29:35 -0800 | | From | "H. Peter Anvin" <> | | Subject | Re: [patch 2/2] x86, fpu: lazy allocation of FPU area - v3 |
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Pavel Machek wrote: > On Thu 2008-03-06 16:51:41, Ingo Molnar wrote: >> * Pavel Machek <pavel@ucw.cz> wrote: >> >>>>> kmem_cache_alloc() can fail (return NULL) and not handling it is a >>>>> bug. >>>> oops. you are correct. Will send a sigsegv in the failure case then. >>>> Thanks. >>> You are introducing possibility of hard to debug error, where previous >>> code just worked... Does not look like good idea to me. >> hm, how does it differ from any other allocation failure? We could fail > > Well, we should not be sending SIGSEGV...? SIGBUS would be cleaner, or > SIGKILL... what happens when userland tries to catch this one? >
I'm confused...
Normally when we need memory for userspace and can't get it, we put the process to sleep until memory is available.
Why is this different in any way?
-hpa
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