From: "David S. Miller" <davem@redhat.com>
To: torvalds@transmeta.com
Cc: akpm@zip.com.au, linux-kernel@vger.kernel.org
Subject: Re: [patch 2/21] reduced locking in buffer.c
Date: Tue, 13 Aug 2002 10:34:28 -0700 (PDT) [thread overview]
Message-ID: <20020813.103428.76618477.davem@redhat.com> (raw)
In-Reply-To: <Pine.LNX.4.44.0208131032210.7411-100000@home.transmeta.com>
From: Linus Torvalds <torvalds@transmeta.com>
Date: Tue, 13 Aug 2002 10:34:37 -0700 (PDT)
On Sun, 11 Aug 2002, Andrew Morton wrote:
> Resend. Replace the buffer lru spinlock protection with
> local_irq_disable and a cross-CPU call to invalidate them.
This almost certainly breaks on sparc, where CPU cross-calls are
non-maskable, so local_irq_disable doesn't do anything for them.
Talk to Davem about this - there may be some workaround.
I told him it's OK in 2.5.x as I've discovered a way to implement
sparc32 (once we have it working again) such that local_irq_disable
blocks cross calls.
next prev parent reply other threads:[~2002-08-13 17:44 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-11 7:38 [patch 2/21] reduced locking in buffer.c Andrew Morton
2002-08-13 17:34 ` Linus Torvalds
2002-08-13 17:34 ` David S. Miller [this message]
2002-08-13 17:53 ` Andrew Morton
2002-08-13 17:52 ` Christoph Hellwig
2002-08-13 18:09 ` Andrew Morton
2002-08-14 8:36 ` William Lee Irwin III
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