From: Suparna Bhattacharya <suparna@in.ibm.com>
To: David Howells <dhowells@redhat.com>
Cc: Andrew Morton <akpm@osdl.org>,
Badari Pulavarty <pbadari@us.ibm.com>,
linux-aio@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: aio stress panic on 2.6.11-mm1
Date: Wed, 9 Mar 2005 16:34:04 +0530 [thread overview]
Message-ID: <20050309110404.GA4088@in.ibm.com> (raw)
In-Reply-To: <18744.1110364438@redhat.com>
Any sense of how costly it is to use spin_lock_irq's vs spin_lock
(across different architectures) ? Isn't rwsem used very widely ?
Regards
Suparna
On Wed, Mar 09, 2005 at 10:33:58AM +0000, David Howells wrote:
> Andrew Morton <akpm@osdl.org> wrote:
>
> > If we want to take the spinlock from interrupt context, the non-interrupt
> > context code needs to do spin_lock_irq(), not spin_lock().
>
> Yeah. I think I had a patch for that somewhere, but I think Linus turned it
> down. I can't find any emails on that subject though. I'll knock together a
> new patch for it.
>
> David
> --
> To unsubscribe, send a message with 'unsubscribe linux-aio' in
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--
Suparna Bhattacharya (suparna@in.ibm.com)
Linux Technology Center
IBM Software Lab, India
next parent reply other threads:[~2005-03-09 10:58 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20050308170107.231a145c.akpm@osdl.org>
[not found] ` <1110327267.24286.139.camel@dyn318077bld.beaverton.ibm.com>
[not found] ` <18744.1110364438@redhat.com>
2005-03-09 11:04 ` Suparna Bhattacharya [this message]
2005-03-09 11:05 ` aio stress panic on 2.6.11-mm1 Andrew Morton
2005-03-09 11:07 ` Arjan van de Ven
2005-03-09 11:17 ` Andi Kleen
2005-03-09 11:28 ` Andrew Morton
2005-03-09 11:59 ` David Howells
2005-03-09 12:12 ` [PATCH] rwsem: Make rwsems use interrupt disabling spinlocks David Howells
2005-03-09 17:35 ` Badari Pulavarty
2005-03-09 19:18 ` Badari Pulavarty
2005-03-09 19:16 ` Badari Pulavarty
2005-03-09 19:42 ` Andrew Morton
2005-03-09 20:10 ` Arjan van de Ven
2005-03-11 9:40 ` Ingo Molnar
2005-03-11 10:07 ` Andrew Morton
2005-03-11 10:25 ` Ingo Molnar
2005-03-09 11:10 ` aio stress panic on 2.6.11-mm1 Arjan van de Ven
2005-03-09 11:21 ` Andi Kleen
2005-03-09 14:48 ` Suparna Bhattacharya
2005-03-09 21:58 ` David Howells
2005-03-09 11:11 ` Andi Kleen
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