Messages in this thread | | | From | Denys Vlasenko <> | Date | Mon, 4 Aug 2014 16:28:03 +0200 | Subject | Re: [PATCH 4/5] x86: entry_64.S: always allocate complete "struct pt_regs" |
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On Fri, Aug 1, 2014 at 7:04 PM, Andy Lutomirski <luto@amacapital.net> wrote: > On Fri, Aug 1, 2014 at 7:48 AM, Denys Vlasenko <dvlasenk@redhat.com> wrote: >> 64-bit code was using six stack slots fewer by not saving/restoring >> registers which a callee-preserved according to C ABI, >> and not allocating space for them > > This is great. > > Next up: remove FIXUP/RESTORE_TOP_OF_STACK? :) Maybe I'll give that a shot.
I'm yet at the stage "what that stuff does anyway?" and at "why do we need percpu old_rsp thingy?" in particular.
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