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
Date: Tue, 09 Sep 2008 18:49:04 +0000 [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
WARNING: multiple messages have this Message-ID (diff)
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: 18+ 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
2008-08-31 17:33 ` Paul E. McKenney
2008-09-03 0:16 ` [PATCH] prevent sparc64 from invoking irq handlers on offline David Miller
2008-09-03 0:16 ` [PATCH] prevent sparc64 from invoking irq handlers on offline CPUs David Miller
2008-09-03 0:42 ` [PATCH] prevent sparc64 from invoking irq handlers on offline Paul E. McKenney
2008-09-03 0:42 ` [PATCH] prevent sparc64 from invoking irq handlers on offline CPUs Paul E. McKenney
2008-09-03 9:21 ` [PATCH] prevent sparc64 from invoking irq handlers on offline David Miller
2008-09-03 9:21 ` [PATCH] prevent sparc64 from invoking irq handlers on offline CPUs David Miller
2008-09-03 15:42 ` [PATCH] prevent sparc64 from invoking irq handlers on offline Paul E. McKenney
2008-09-03 15:42 ` [PATCH] prevent sparc64 from invoking irq handlers on offline CPUs Paul E. McKenney
2008-09-09 0:17 ` [PATCH] prevent sparc64 from invoking irq handlers on offline David Miller
2008-09-09 0:17 ` [PATCH] prevent sparc64 from invoking irq handlers on offline CPUs David Miller
2008-09-09 14:54 ` [PATCH] prevent sparc64 from invoking irq handlers on offline Paul E. McKenney
2008-09-09 14:54 ` [PATCH] prevent sparc64 from invoking irq handlers on offline CPUs Paul E. McKenney
2008-09-09 18:49 ` Manfred Spraul [this message]
2008-09-09 18:49 ` Manfred Spraul
2008-09-09 19:57 ` [PATCH] prevent sparc64 from invoking irq handlers on offline David Miller
2008-09-09 19:57 ` [PATCH] prevent sparc64 from invoking irq handlers on offline CPUs 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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.