From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: James Hogan <james.hogan@imgtec.com>,
Andrew Morton <akpm@linux-foundation.org>,
"David S. Miller" <davem@davemloft.net>,
Peter Zijlstra <peterz@infradead.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
Helge Deller <deller@gmx.de>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
LKML <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@kernel.org>,
"James E.J. Bottomley" <jejb@parisc-linux.org>,
"H. Peter Anvin" <hpa@zytor.com>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Thomas Gleixner <tglx@linutronix.de>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
Paul Mackerras <paulus@au1.ibm.com>
Subject: Re: [PATCH] powerpc/irq: Run softirqs off the top of the irq stack
Date: Tue, 24 Sep 2013 06:51:07 +1000 [thread overview]
Message-ID: <1379969467.11249.21.camel@pasglop> (raw)
In-Reply-To: <CA+55aFwcPU+fAqDGp0QhSYip7MYPBB+kQiU4GHEdgMo82i7RVg@mail.gmail.com>
On Mon, 2013-09-23 at 09:47 -0700, Linus Torvalds wrote:
> On Sun, Sep 22, 2013 at 9:35 PM, Benjamin Herrenschmidt
> <benh@kernel.crashing.org> wrote:
> >
> > This is the "band aid" discussed so far for the stack overflow
> > problem for powerpc.
>
> I don't think it's a "band-aid" in any way, except perhaps in the
> sense that there are certainly other things we can also do in this
> series (ie I liked Frederic's cleanups etc).
Ah yes, I thought of it as a band-aid in the sense that a better
approach would be to switch to the irq stack earlier like x86_64 does
but that would be a lot more invasive. Definitely something I would look
into if I was to tackle changing how we do per-cpu and the PACA though.
Cheers,
Ben.
WARNING: multiple messages have this Message-ID (diff)
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
Peter Zijlstra <peterz@infradead.org>,
"H. Peter Anvin" <hpa@zytor.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
LKML <linux-kernel@vger.kernel.org>,
Paul Mackerras <paulus@au1.ibm.com>,
Ingo Molnar <mingo@kernel.org>,
James Hogan <james.hogan@imgtec.com>,
"James E.J. Bottomley" <jejb@parisc-linux.org>,
Helge Deller <deller@gmx.de>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
"David S. Miller" <davem@davemloft.net>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH] powerpc/irq: Run softirqs off the top of the irq stack
Date: Tue, 24 Sep 2013 06:51:07 +1000 [thread overview]
Message-ID: <1379969467.11249.21.camel@pasglop> (raw)
In-Reply-To: <CA+55aFwcPU+fAqDGp0QhSYip7MYPBB+kQiU4GHEdgMo82i7RVg@mail.gmail.com>
On Mon, 2013-09-23 at 09:47 -0700, Linus Torvalds wrote:
> On Sun, Sep 22, 2013 at 9:35 PM, Benjamin Herrenschmidt
> <benh@kernel.crashing.org> wrote:
> >
> > This is the "band aid" discussed so far for the stack overflow
> > problem for powerpc.
>
> I don't think it's a "band-aid" in any way, except perhaps in the
> sense that there are certainly other things we can also do in this
> series (ie I liked Frederic's cleanups etc).
Ah yes, I thought of it as a band-aid in the sense that a better
approach would be to switch to the irq stack earlier like x86_64 does
but that would be a lot more invasive. Definitely something I would look
into if I was to tackle changing how we do per-cpu and the PACA though.
Cheers,
Ben.
next prev parent reply other threads:[~2013-09-23 20:52 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-19 19:51 [RFC GIT PULL] softirq: Consolidation and stack overrun fix Frederic Weisbecker
2013-09-19 19:51 ` [PATCH 1/3] irq: Consolidate do_softirq() arch overriden implementations Frederic Weisbecker
2013-09-19 19:51 ` [PATCH 2/3] irq: Execute softirq on its own stack on irq exit Frederic Weisbecker
2013-09-19 19:51 ` [PATCH 3/3] irq: Comment on the use of inline stack for ksoftirqd Frederic Weisbecker
2013-09-20 0:02 ` [RFC GIT PULL] softirq: Consolidation and stack overrun fix Linus Torvalds
2013-09-20 1:53 ` Benjamin Herrenschmidt
2013-09-20 11:03 ` Thomas Gleixner
2013-09-20 11:11 ` Peter Zijlstra
2013-09-21 0:55 ` Benjamin Herrenschmidt
2013-09-20 16:26 ` Frederic Weisbecker
2013-09-20 17:30 ` Thomas Gleixner
2013-09-20 18:37 ` Frederic Weisbecker
2013-09-20 22:14 ` Linus Torvalds
2013-09-21 7:47 ` Ingo Molnar
2013-09-21 18:58 ` Frederic Weisbecker
2013-09-21 21:45 ` Benjamin Herrenschmidt
2013-09-21 23:27 ` Frederic Weisbecker
2013-09-22 2:01 ` H. Peter Anvin
2013-09-22 4:39 ` Benjamin Herrenschmidt
2013-09-22 4:41 ` Benjamin Herrenschmidt
2013-09-22 16:24 ` Peter Zijlstra
2013-09-22 17:47 ` H. Peter Anvin
2013-09-22 22:00 ` Benjamin Herrenschmidt
2013-09-22 21:56 ` Benjamin Herrenschmidt
2013-09-22 22:22 ` Linus Torvalds
2013-09-22 22:38 ` Benjamin Herrenschmidt
2013-09-23 4:35 ` [PATCH] powerpc/irq: Run softirqs off the top of the irq stack Benjamin Herrenschmidt
2013-09-23 4:35 ` Benjamin Herrenschmidt
2013-09-23 7:56 ` Stephen Rothwell
2013-09-23 7:56 ` Stephen Rothwell
2013-09-23 10:13 ` Benjamin Herrenschmidt
2013-09-23 10:13 ` Benjamin Herrenschmidt
2013-09-23 16:47 ` Linus Torvalds
2013-09-23 16:47 ` Linus Torvalds
2013-09-23 20:51 ` Benjamin Herrenschmidt [this message]
2013-09-23 20:51 ` Benjamin Herrenschmidt
2013-09-24 5:42 ` [PATCH v2] " Benjamin Herrenschmidt
2013-09-24 5:42 ` Benjamin Herrenschmidt
2013-09-23 17:59 ` [RFC GIT PULL] softirq: Consolidation and stack overrun fix Chris Metcalf
2013-09-23 20:57 ` Benjamin Herrenschmidt
2013-09-24 19:27 ` Chris Metcalf
2013-09-24 20:58 ` Benjamin Herrenschmidt
2013-09-24 0:10 ` Benjamin Herrenschmidt
2013-09-24 1:19 ` Linus Torvalds
2013-09-24 1:52 ` Benjamin Herrenschmidt
2013-09-24 8:04 ` Peter Zijlstra
2013-09-24 8:16 ` Benjamin Herrenschmidt
2013-09-24 8:21 ` Peter Zijlstra
2013-09-24 9:31 ` Benjamin Herrenschmidt
2013-09-23 4:40 ` Benjamin Herrenschmidt
2013-09-23 5:01 ` David Miller
2013-09-24 2:44 ` Frederic Weisbecker
2013-09-24 4:42 ` Benjamin Herrenschmidt
2013-09-24 13:56 ` Frederic Weisbecker
2013-09-24 20:55 ` Benjamin Herrenschmidt
2013-09-25 8:46 ` Frederic Weisbecker
2013-09-21 0:52 ` Benjamin Herrenschmidt
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=1379969467.11249.21.camel@pasglop \
--to=benh@kernel.crashing.org \
--cc=akpm@linux-foundation.org \
--cc=davem@davemloft.net \
--cc=deller@gmx.de \
--cc=fweisbec@gmail.com \
--cc=heiko.carstens@de.ibm.com \
--cc=hpa@zytor.com \
--cc=james.hogan@imgtec.com \
--cc=jejb@parisc-linux.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=mingo@kernel.org \
--cc=paulus@au1.ibm.com \
--cc=peterz@infradead.org \
--cc=schwidefsky@de.ibm.com \
--cc=tglx@linutronix.de \
--cc=torvalds@linux-foundation.org \
/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.