Messages in this thread | | | From | Andi Kleen <> | Subject | Re: [PATCH] [20/45] x86_64: Use 8 byte stack alignment when possible | Date | Mon, 1 Oct 2007 00:07:59 +0200 |
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On Friday 21 September 2007 23:19:35 Jakub Jelinek wrote: > On Fri, Sep 21, 2007 at 10:45:02PM +0200, Andi Kleen wrote: > > > > Kernel doesn't use SSE2, so it doesn't need 16 byte alignment. Also > > the stack can be already unaligned so letting the compiler align > > is useless. This may make some stack frames smaller. > > Shouldn't sources that are compiled into the VDSO or VSYSCALL pages > revert this to the default?
I see not reason. vdso/vsyscall don't contain any SSE code and also don't do any callbacks to other user code. Except for signals and signals already align the stack by themselves.
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