From: Pavel Machek <pavel@suse.cz>
To: Manfred Spraul <manfred@colorfullife.com>
Cc: Robert Love <rml@tech9.net>,
Roger Larsson <roger.larsson@norran.net>,
linux-kernel@vger.kernel.org, nigel@nrg.org
Subject: Re: [SMP lock BUG?] Re: Feedback on preemptible kernel patch
Date: Fri, 14 Sep 2001 09:15:59 +0000 [thread overview]
Message-ID: <20010914091558.A35@toy.ucw.cz> (raw)
In-Reply-To: <000901c138bbe151270/mnt/sendme10411ac@local> <1000007070.836.14.camel@phantasy> <001a01c1390262c7f30/mnt/sendme10411ac@local>
In-Reply-To: <001a01c1390262c7f30/mnt/sendme10411ac@local>; from manfred@colorfullife.com on Sun, Sep 09, 2001 at 09:38:16AM +0200
Hi!
> > #define kmap_atomic(page,idx) ctx_sw_off(); kmap(page);
> > #define kunmap_atomic(page,idx) ctx_sw_on(); kunmap(page);
> >
> No. kmap_atomic is called from interrupt context, and kmap calls
> schedule().
>
> I thought about the attached patch (completely untested).
is it legal to kmap_atomic(a,b); kmap_atomic(c,d); kunmap_atomic(a,b); ?
If so, your patch may need some ounting....
Pavel
--
Philips Velo 1: 1"x4"x8", 300gram, 60, 12MB, 40bogomips, linux, mutt,
details at http://atrey.karlin.mff.cuni.cz/~pavel/velo/index.html.
next prev parent reply other threads:[~2001-09-17 22:31 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-09-08 23:11 Manfred Spraul
2001-09-09 3:44 ` Robert Love
2001-09-09 7:38 ` Manfred Spraul
[not found] ` <001a01c1390262c7f30/mnt/sendme10411ac@local>
2001-09-14 9:15 ` Pavel Machek [this message]
2001-09-17 22:40 ` Manfred Spraul
2001-09-18 0:19 ` Robert Love
2001-09-17 22:41 ` Robert Love
-- strict thread matches above, loose matches on Subject: below --
2001-09-08 17:33 Arjan Filius
2001-09-08 20:58 ` [SMP lock BUG?] " Roger Larsson
2001-09-08 22:18 ` Arjan Filius
2001-09-09 14:55 ` george anzinger
2001-09-09 22:25 ` Arjan Filius
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