linux-kernel - Re: [GIT PULL] adaptive spinning mutexes

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Date:	Thu, 15 Jan 2009 12:45:21 +0100
From:	Folkert van Heusden <folkert@...heusden.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Kay Sievers <kay.sievers@...y.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	torvalds@...ux-foundation.org, a.p.zijlstra@...llo.nl,
	paulmck@...ux.vnet.ibm.com, ghaskins@...ell.com, matthew@....cx,
	andi@...stfloor.org, chris.mason@...cle.com,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-btrfs@...r.kernel.org, tglx@...utronix.de, npiggin@...e.de,
	pmorreale@...ell.com, SDietrich@...ell.com,
	dmitry.adamushko@...il.com, hannes@...xchg.org
Subject: Re: [GIT PULL] adaptive spinning mutexes

> > >> > You just disproved your own case :(
> > >>
> > >> how so? 80% is not enough? I also checked Fedora and it has
> > >> SCHED_DEBUG=y in its kernel rpms.
> > >
> > > Ubuntu has CONFIG_SCHED_DEBUG=y as well in their kernels.

Debian too:

mauer:~/bin# grep CONFIG_SCHED_DEBUG /boot/config-2.6.2*
/boot/config-2.6.24-1-amd64:# CONFIG_SCHED_DEBUG is not set
/boot/config-2.6.25-2-amd64:CONFIG_SCHED_DEBUG=y
/boot/config-2.6.26-1-amd64:CONFIG_SCHED_DEBUG=y

> > $ zgrep DEBUG_MUTEX /proc/config.gz
> > # CONFIG_DEBUG_MUTEXES is not set

mauer:~/bin# grep DEBUG_MUTEX /boot/config-2.6.2*
/boot/config-2.6.22-3-amd64:# CONFIG_DEBUG_MUTEXES is not set
/boot/config-2.6.24-1-amd64:# CONFIG_DEBUG_MUTEXES is not set
/boot/config-2.6.25-2-amd64:# CONFIG_DEBUG_MUTEXES is not set
/boot/config-2.6.26-1-amd64:# CONFIG_DEBUG_MUTEXES is not set


Folkert van Heusden

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