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.
next prev parent reply other threads:[~2013-09-23 20:52 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1379620267-25191-1-git-send-email-fweisbec@gmail.com>
[not found] ` <CA+55aFyXf370Ds6FH5wPPycZLSPD5qiP7rjWqxwDetfHfKjg1w@mail.gmail.com>
[not found] ` <alpine.DEB.2.02.1309201244080.4089@ionos.tec.linutronix.de>
[not found] ` <20130920162603.GA30381@localhost.localdomain>
[not found] ` <CA+55aFyBcjP2U6ipzZay=FdhzA4oFNwE4tU0OcJJhwFvgoeALw@mail.gmail.com>
[not found] ` <CAFTL4hzucS5nJbCrArPv9zfY=QpyUESMK2Th0tKFHVCjDP7-eA@mail.gmail.com>
[not found] ` <1379799901.24090.6.camel@pasglop>
[not found] ` <523E4F8A.7020708@zytor.com>
[not found] ` <1379824754.24090.11.camel@pasglop>
[not found] ` <1379824861.24090.12.camel@pasglop>
[not found] ` <20130922162410.GA10649@laptop.programming.kicks-ass.net>
[not found] ` <1379887000.24090.19.camel@pasglop>
[not found] ` <CA+55aFwaf_Wst=AS75ydBJVQ6aJxPfAzXdt-UXj3qC9WeUt7kw@mail.gmail.com>
[not found] ` <1379889489.24090.34.camel@pasglop>
2013-09-23 4:35 ` [PATCH] powerpc/irq: Run softirqs off the top of the irq stack Benjamin Herrenschmidt
2013-09-23 7:56 ` Stephen Rothwell
2013-09-23 10:13 ` Benjamin Herrenschmidt
2013-09-23 16:47 ` Linus Torvalds
2013-09-23 20:51 ` Benjamin Herrenschmidt [this message]
2013-09-24 5:42 ` [PATCH v2] " Benjamin Herrenschmidt
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