From mboxrd@z Thu Jan 1 00:00:00 1970 From: Frederic Weisbecker Subject: Re: [patch 00/35] Jeff's ReiserFS Patch Queue Date: Wed, 1 Apr 2009 18:51:36 +0200 Message-ID: <20090401165134.GA5924@nowhere> References: <20090330180215.951354436@suse.com> <20090401161657.GA13802@elte.hu> <49D39642.9070606@suse.com> <20090401163407.GE22517@elte.hu> Mime-Version: 1.0 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:received:date:from:to:cc :subject:message-id:references:mime-version:content-type :content-disposition:content-transfer-encoding:in-reply-to :user-agent; bh=0EzAC1NVAzsm5QHBUJJepdc/k+9MqerLgGEYpxGqHGE=; b=CIT6IwrmEmh9AICq24QXDNF+dgYs8JyUK9C+Fa/X73DGjDDpi7+cp/B8nt0hfvn/AU lw8aamBPJOA4GzxY4Zfz2OLXaqzmZf4VwXSHz6maWPmT3ymBjm2vgxz+H46Sca8GolBj R3OTjJT11q6Za+nzN4cXcrVVnRE2z3k+pi858= Content-Disposition: inline In-Reply-To: <20090401163407.GE22517@elte.hu> Sender: reiserfs-devel-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="iso-8859-1" To: Ingo Molnar Cc: Jeff Mahoney , Linus Torvalds , Peter Zijlstra , Linux Kernel Mailing List , Andrew Morton , ReiserFS Development List On Wed, Apr 01, 2009 at 06:34:07PM +0200, Ingo Molnar wrote: >=20 > * Jeff Mahoney wrote: >=20 > > -----BEGIN PGP SIGNED MESSAGE----- > > Hash: SHA1 > >=20 > > Ingo Molnar wrote: > > > * Linus Torvalds wrote: > > >=20 > > >>> Once this is applied, I expect reiserfs to be in deep=20 > > >>> maintenance-only mode. > > >> Heh, I hadn't expected even this. > > >=20 > > > Note, there are BKL-removal patches in the works by Fr=E9d=E9ric=20 > > > Weisbecker, for the tip:kill-the-BKL topic branch. > > >=20 > > > Reiser3 is the heaviest (and most non-trivial) BKL user amongst a= ll=20 > > > the filesystems, its BKL use is recursive and it frequently relie= s=20 > > > on the implicit dropping of the BKL at various blocking points bo= th=20 > > > for correctness and for performance reasons. > > >=20 > > > There might be something worth posting+reviewing soon. > >=20 > > Oh interesting. I'm glad someone is working on this. I've started=20 > > to several times and decided to focus my efforts on things outside=20 > > of reiserfs instead. The reiserfs usage of the BKL has always been=20 > > a black mark. >=20 > I'll let Frederic describe it but AFAIK the patch is working fine=20 > with the BKL as a mutex and no lockdep complaints or lockups. The=20 > main focus is now on finding the performance affecting spots,=20 > because Frederic's main desktop is on reiserfs and he does not=20 > accept a slowdown :) Hehe :-) No actually I would accept a tiny slowdown but I fear that the common reiserfs users wouldn't. I'm still working on this and once it's ready enough for an RFC patch, I'll explain how is done the conversion to a mutex. Stay tuned. =20 > Ingo -- To unsubscribe from this list: send the line "unsubscribe reiserfs-deve= l" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html