From: Peter Zijlstra <peterz@infradead.org>
To: Robert Richter <robert.richter@amd.com>
Cc: Maarten Lankhorst <m.b.lankhorst@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
"x86@kernel.org" <x86@kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Andi Kleen <andi@firstfloor.org>
Subject: Re: [PATCH v2] oprofile, x86: Move memory allocation for ppro out of per cpu
Date: Mon, 01 Aug 2011 14:37:11 +0200 [thread overview]
Message-ID: <1312202231.2617.458.camel@laptop> (raw)
In-Reply-To: <20110801070742.GA11795@erda.amd.com>
On Mon, 2011-08-01 at 09:07 +0200, Robert Richter wrote:
> Can you please describe the root problem more precisely. Why can't you
> run it on -rt? What is broken?
Because the allocators don't work from atomic context anymore. Now -rt
doesn't have a lot of real atomic contexts left so its usually not much
of a problem, but CPU_STARTING and actual IPIs are of course still
atomic.
next prev parent reply other threads:[~2011-08-01 12:32 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-31 18:39 [PATCH v2] oprofile, x86: Move memory allocation for ppro out of per cpu Maarten Lankhorst
2011-08-01 7:07 ` Robert Richter
2011-08-01 12:37 ` Peter Zijlstra [this message]
2011-08-01 14:57 ` Maarten Lankhorst
2011-08-01 15:08 ` [PATCH v3] oprofile, x86: Convert memory allocation to static array Maarten Lankhorst
2011-08-01 16:20 ` Andi Kleen
2011-08-01 21:31 ` Robert Richter
2011-08-01 21:41 ` Andi Kleen
2011-08-01 22:16 ` Robert Richter
2011-08-16 22:11 ` [PATCH] oprofile, x86: Fix overflow and warning (commit 1d12d35) Robert Richter
2011-08-01 22:02 ` [PATCH v3] oprofile, x86: Convert memory allocation to static array Peter Zijlstra
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