Re: [PATCH][2.6] Allow x86_64 to reenable interrupts on contention

[Andrew Morton]

Zwane Mwaikambo <zwane@xxxxxxxxxxxxx> wrote:
>
> On Tue, 27 Jul 2004, Andi Kleen wrote:
> 
>  > On Tue, 27 Jul 2004 05:29:10 -0400 (EDT)
>  > Zwane Mwaikambo <zwane@xxxxxxxxxxxxx> wrote:
>  >
>  > > This is a follow up to the previous patches for ia64 and i386, it will
>  > > allow x86_64 to reenable interrupts during contested locks depending on
>  > > previous interrupt enable status. It has been runtime and compile tested
>  > > on UP and 2x SMP Linux-tiny/x86_64.
>  >
>  > This will likely increase code size. Do you have numbers by how much? And is it
>  > really worth it?
> 
>  Yes there is a growth;
> 
>     text    data     bss     dec     hex filename
>  3655358 1340511  486128 5481997  53a60d vmlinux-after
>  3648445 1340511  486128 5475084  538b0c vmlinux-before

The growth is all in the out-of-line section, so there should be no
significant additional icache pressure.

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