From: Robert Love <rml@tech9.net>
To: Pavel Machek <pavel@suse.cz>
Cc: Manfred Spraul <manfred@colorfullife.com>,
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: 17 Sep 2001 18:41:46 -0400 [thread overview]
Message-ID: <1000766512.12771.4.camel@phantasy> (raw)
In-Reply-To: <20010914091558.A35@toy.ucw.cz>
In-Reply-To: <000901c138bbe151270/mnt/sendme10411ac@local> <1000007070.836.14.camel@phantasy> <001a01c1390262c7f30/mnt/sendme10411ac@local> <20010914091558.A35@toy.ucw.cz>
On Fri, 2001-09-14 at 05:15, Pavel Machek wrote:
> is it legal to kmap_atomic(a,b); kmap_atomic(c,d); kunmap_atomic(a,b); ?
> If so, your patch may need some ounting....
ctx_sw_on and ctx_sw_off use a recursive spinlock, so the calls to
kunmap_atomic won't drop the slock until the last call.
--
Robert M. Love
rml at ufl.edu
rml at tech9.net
next prev parent reply other threads:[~2001-09-17 22:42 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-09-08 23:11 [SMP lock BUG?] Re: Feedback on preemptible kernel patch 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
2001-09-17 22:40 ` Manfred Spraul
2001-09-18 0:19 ` Robert Love
2001-09-17 22:41 ` Robert Love [this message]
-- 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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1000766512.12771.4.camel@phantasy \
--to=rml@tech9.net \
--cc=linux-kernel@vger.kernel.org \
--cc=manfred@colorfullife.com \
--cc=nigel@nrg.org \
--cc=pavel@suse.cz \
--cc=roger.larsson@norran.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox