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Date: Thu, 2 Apr 2009 01:59:39 +0200 From: Frederic Weisbecker <fweisbec@...il.com> To: Bron Gondwana <brong@...tmail.fm> Cc: Ingo Molnar <mingo@...e.hu>, Jeff Mahoney <jeffm@...e.com>, Linus Torvalds <torvalds@...ux-foundation.org>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Andrew Morton <akpm@...ux-foundation.org>, ReiserFS Development List <reiserfs-devel@...r.kernel.org> Subject: Re: [patch 00/35] Jeff's ReiserFS Patch Queue On Thu, Apr 02, 2009 at 09:18:50AM +1100, Bron Gondwana wrote: > On Wed, Apr 01, 2009 at 06:51:36PM +0200, Frederic Weisbecker wrote: > > > I'll let Frederic describe it but AFAIK the patch is working fine > > > with the BKL as a mutex and no lockdep complaints or lockups. The > > > main focus is now on finding the performance affecting spots, > > > because Frederic's main desktop is on reiserfs and he does not > > > accept a slowdown :) > > > > Hehe :-) > > No actually I would accept a tiny slowdown but I fear that the common > > reiserfs users wouldn't. > > We run big(ish) imap servers with up to 80 reiserfs partitions > spread over a bunch of SCSI or SAS attached external drive units. > I'm actually surprised that the BKL isn't causing us much pain > (load is amazingly low considering how many users are on these > boxes - at least now that we have 32Gb RAM and 64 bit kernels). > > Are you still using an "entire reiserfs subsystem" mutex, or > per-filesystem locking? If it's per filesystem, then I suspect > we'll be big fans! Yeah. It is per superblock :-) Frederic. > > > 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. > > Sure will! > > Thanks, > > Bron. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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