From: Andi Kleen <andi@firstfloor.org>
To: linux-kernel@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH 10/20] hpfs: replace BKL with a global mutex
Date: Tue, 25 Jan 2011 16:15:51 -0800 [thread overview]
Message-ID: <m2oc7434g8.fsf@firstfloor.org> (raw)
In-Reply-To: 1295993854-4971-11-git-send-email-arnd@arndb.de
Arnd Bergmann <arnd@arndb.de> writes:
> This removes the BKL in hpfs in a rather awful
> way, by replacing it with a mutex that basically
> serializes the entire file system.
I don't think that's a very good idea, there's danger
of holding it over IO and that would be really bad (as in like MINIX[1])
It would be better to do it the i810 way and check for the number of
CPUs at module init time and refuse to run if it's > 1
-Andi
[1] showing my age
--
Andi Kleen
Intel Open Source Technology Center
next prev parent reply other threads:[~2011-01-26 0:16 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-25 22:17 [RFC 00/20] Proposal for remaining BKL users Arnd Bergmann
2011-01-25 22:17 ` Arnd Bergmann
2011-01-25 22:17 ` [PATCH 01/20] drm/i810: remove the BKL Arnd Bergmann
2011-01-25 22:17 ` [PATCH 02/20] drm: remove i830 driver Arnd Bergmann
2011-01-25 22:17 ` [PATCH 03/20] staging/usbip: convert to kthread Arnd Bergmann
2011-01-28 17:53 ` Max Vozeler
2011-01-28 18:48 ` Arnd Bergmann
2011-03-01 22:15 ` Arnd Bergmann
2011-01-25 22:17 ` [PATCH 04/20] staging/cx25721: serialize access to devlist Arnd Bergmann
2011-01-26 16:23 ` Palash Bandyopadhyay
2011-01-31 21:37 ` Greg KH
2011-01-25 22:17 ` [PATCH 05/20] staging/go7007: remove the BKL Arnd Bergmann
2011-01-25 22:17 ` [PATCH 06/20] staging: Remove autofs3 Arnd Bergmann
2011-01-26 7:41 ` H. Peter Anvin
2011-01-25 22:17 ` [PATCH 07/20] staging: remove smbfs Arnd Bergmann
2011-01-25 22:17 ` [PATCH 08/20] adfs: remove the big kernel lock Arnd Bergmann
2011-01-25 22:20 ` Russell King
2011-01-25 22:17 ` [PATCH 09/20] hpfs: rename big kernel lock to hpfs_lock Arnd Bergmann
2011-01-25 22:17 ` [PATCH 10/20] hpfs: replace BKL with a global mutex Arnd Bergmann
2011-01-26 0:15 ` Andi Kleen [this message]
2011-01-26 0:19 ` Andi Kleen
2011-01-26 12:48 ` [PATCH v2] hpfs: remove the BKL Arnd Bergmann
2011-01-26 12:50 ` [PATCH 10/20] hpfs: replace BKL with a global mutex Arnd Bergmann
2011-01-26 16:52 ` Andi Kleen
2011-01-27 5:01 ` Nick Piggin
2011-01-27 10:57 ` Miklos Szeredi
2011-01-25 22:17 ` [PATCH 11/20] hpfs: move to drivers/staging Arnd Bergmann
2011-02-07 16:17 ` Mikulas Patocka
2011-02-07 19:31 ` Arnd Bergmann
2011-01-25 22:17 ` [PATCH 12/20] x25: remove the BKL Arnd Bergmann
2011-01-27 10:07 ` Andrew Hendry
2011-01-27 12:17 ` Arnd Bergmann
2011-01-27 12:38 ` [PATCH v2] " Arnd Bergmann
2011-01-27 13:20 ` Eric Dumazet
2011-01-27 13:43 ` Arnd Bergmann
2011-01-25 22:17 ` [PATCH 13/20] appletalk: move to staging Arnd Bergmann
2011-01-25 22:17 ` [PATCH 14/20] staging/appletalk: remove the BKL Arnd Bergmann
2011-01-25 22:29 ` David Miller
2011-01-26 12:57 ` Arnd Bergmann
2011-01-25 22:17 ` [PATCH 15/20] ufs: " Arnd Bergmann
2011-01-26 2:30 ` Nick Bowler
2011-01-26 12:53 ` Arnd Bergmann
2011-01-27 5:47 ` Nick Piggin
2011-01-27 13:13 ` Arnd Bergmann
2011-01-25 22:17 ` [PATCH 16/20] ipx: " Arnd Bergmann
2011-01-25 22:17 ` [PATCH 17/20] tracing: don't trace " Arnd Bergmann
2011-01-25 22:28 ` Frederic Weisbecker
2011-01-25 22:17 ` [PATCH 18/20] rtmutex-tester: remove BKL tests Arnd Bergmann
2011-01-26 15:00 ` [tip:core/locking] rtmutex-tester: Remove " tip-bot for Arnd Bergmann
2011-02-22 20:57 ` [tip:irq/core] rtmutex: tester: " tip-bot for Arnd Bergmann
2011-01-25 22:17 ` [PATCH 19/20] drivers: remove extraneous includes of smp_lock.h Arnd Bergmann
2011-01-25 22:17 ` [PATCH 20/20] BKL: That's all, folks Arnd Bergmann
2011-01-26 6:19 ` Ingo Molnar
2011-01-26 8:47 ` Alan Cox
2011-01-26 11:01 ` Ingo Molnar
2011-01-26 11:22 ` Thomas Gleixner
2011-01-26 2:22 ` [RFC 00/20] Proposal for remaining BKL users Greg KH
2011-01-26 2:22 ` Greg KH
2011-01-26 11:31 ` Arnd Bergmann
2011-01-26 11:31 ` Arnd Bergmann
2011-01-26 11:58 ` Mauro Carvalho Chehab
2011-01-26 13:45 ` Arnd Bergmann
2011-01-26 13:45 ` Arnd Bergmann
2011-01-26 13:45 ` Arnd Bergmann
2011-01-26 16:24 ` Palash Bandyopadhyay
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