From: Manfred Spraul <manfred@colorfullife.com>
To: David Miller <davem@davemloft.net>
Cc: paulmck@linux.vnet.ibm.com, linux-kernel@vger.kernel.org,
wli@holomorphy.com, sparclinux@vger.kernel.org,
akpm@linux-foundation.org
Subject: Re: [PATCH] prevent sparc64 from invoking irq handlers on offline CPUs
Date: Tue, 09 Sep 2008 20:49:04 +0200 [thread overview]
Message-ID: <48C6C520.5070103@colorfullife.com> (raw)
In-Reply-To: <20080908.171708.43575256.davem@davemloft.net>
David Miller wrote:
> And IPI handler runs in HW irq context, therefore such an IPI-creates-an-IPI
> should not be allowed, at least not directly.
>
> Actually the restriction seems to be that an IPI cannot be sent when
> "irqs_disabled()", hmmm...
>
>
Does this apply to smp_send_reschedule() as well?
A [rare] codepath in the current rcu code does to trigger quiescent
states on remote cpus.
--
Manfred
next prev parent reply other threads:[~2008-09-09 18:49 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-31 17:33 [PATCH] prevent sparc64 from invoking irq handlers on offline CPUs Paul E. McKenney
2008-09-03 0:16 ` David Miller
2008-09-03 0:42 ` Paul E. McKenney
2008-09-03 9:21 ` David Miller
2008-09-03 15:42 ` Paul E. McKenney
2008-09-09 0:17 ` David Miller
2008-09-09 14:54 ` Paul E. McKenney
2008-09-09 18:49 ` Manfred Spraul [this message]
2008-09-09 19:57 ` David Miller
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=48C6C520.5070103@colorfullife.com \
--to=manfred@colorfullife.com \
--cc=akpm@linux-foundation.org \
--cc=davem@davemloft.net \
--cc=linux-kernel@vger.kernel.org \
--cc=paulmck@linux.vnet.ibm.com \
--cc=sparclinux@vger.kernel.org \
--cc=wli@holomorphy.com \
/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