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Date:      Sat, 24 Aug 2013 20:44:23 +0400 (MSK)
From:      Dmitry Morozovsky <marck@rinet.ru>
To:        Alexander Motin <mav@freebsd.org>
Cc:        svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org
Subject:   Re: svn commit: r254787 - head/sys/kern
Message-ID:  <alpine.BSF.2.00.1308242042030.21486@woozle.rinet.ru>
In-Reply-To: <5218DE6C.4060700@FreeBSD.org>
References:  <201308241441.r7OEfnFx060671@svn.freebsd.org> <alpine.BSF.2.00.1308241926410.21486@woozle.rinet.ru> <5218D22F.8000009@FreeBSD.org> <alpine.BSF.2.00.1308242009140.21486@woozle.rinet.ru> <5218DE6C.4060700@FreeBSD.org>

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On Sat, 24 Aug 2013, Alexander Motin wrote:

> > > > >     Remove locking from taskqueue_member().  The list of threads is
> > 
> > Ah, so IIUC, it does not depend on other changes and could be tested on 
> > stock stable/9 right now?  If so, I'd merge this to our tinderbox/poudriere 
> > builder and test.
> 
> Yes, it is completely independent. Please, welcome. I am just not sure whether
> you notice much difference unless you have really a lot of IOPS. On my tests
> doing 90K IOPS over bunch of SSDs I've measured difference of several
> percents.

Yes, this is not a case of a builder, as most of IOSP is done in tmpfs (BTW, 
doesn't this lock appliy there as well?)

OTOH, we have a couple of iSCSI storages where this could be useable too...

-- 
Sincerely,
D.Marck                                     [DM5020, MCK-RIPE, DM3-RIPN]
[ FreeBSD committer:                                 marck@FreeBSD.org ]
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*** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck@rinet.ru ***
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