Re: [PATCH] i386 spinlocks should use the full 32 bits, not only 8 bits

From: Ingo Molnar
Date: Thu Oct 20 2005 - 17:53:54 EST



* Andrew Morton <akpm@xxxxxxxx> wrote:

> spin_lock is still uninlined.

yes, and that should stay so i believe, for text size reasons. The BTB
should eliminate most effects of the call+ret itself.

> as is spin_lock_irqsave() and spin_lock_irq()

yes, for them the code length is even higher.

> uninlining spin_lock will probably increase overall text size, but
> mainly in the out-of-line section.

you mean inlining it again? I dont think we should do it.

> read_lock is out-of-line. read_unlock is inlined
>
> write_lock is out-of-line. write_unlock is out-of-line.

hm, with my patch, write_unlock should be inlined too.

Ingo
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