Re: [RFC PATCH] mutex: Apply adaptive spinning on mutex_trylock()

From: Linus Torvalds
Date: Wed Mar 23 2011 - 11:48:27 EST

On Wed, Mar 23, 2011 at 8:37 AM, Tejun Heo <tj@xxxxxxxxxx> wrote:
> Currently, mutex_trylock() doesn't use adaptive spinning.  It tries
> just once.  I got curious whether using adaptive spinning on
> mutex_trylock() would be beneficial and it seems so, at least for
> btrfs anyway.

Hmm. Seems reasonable to me. The patch looks clean, although part of
that is just the mutex_spin() cleanup that is independent of actually
using it in trylock.

So no objections from me.

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