From: Andi Kleen <ak@suse.de>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Steven Rostedt <rostedt@goodmis.org>,
LKML <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@osdl.org>, Linus Torvalds <torvalds@osdl.org>,
Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
Martin Mares <mj@atrey.karlin.mff.cuni.cz>,
bjornw@axis.com, schwidefsky@de.ibm.com,
benedict.gaster@superh.com, lethal@linux-sh.org,
Chris Zankel <chris@zankel.net>,
Marc Gauthier <marc@tensilica.com>,
Joe Taylor <joe@tensilica.com>,
David Mosberger-Tang <davidm@hpl.hp.com>,
rth@twiddle.net, spyro@f2s.com, starvik@axis.com,
tony.luck@intel.com, linux-ia64@vger.kernel.org,
ralf@linux-mips.org, linux-mips@linux-mips.org,
grundler@parisc-linux.org, parisc-linux@parisc-linux.org,
linuxppc-dev@ozlabs.org, paulus@samba.org, linux390@de.ibm.com,
davem@davemloft.net
Subject: Re: [PATCH 00/05] robust per_cpu allocation for modules
Date: Mon, 17 Apr 2006 17:10:46 +0000 [thread overview]
Message-ID: <200604171910.48838.ak@suse.de> (raw)
In-Reply-To: <4441ECE6.5010709@yahoo.com.au>
On Sunday 16 April 2006 09:06, Nick Piggin wrote:
> I still don't understand what the justification is for slowing down
> this critical bit of infrastructure for something that is only a
> problem in the -rt patchset, and even then only a problem when tracing
> is enabled.
There are actually problems outside -rt. e.g. the Xen kernel was running
into a near overflow and as more and more code is using per cpu variables
others might too.
I'm confident the problem can be solved without adding more variables
though - e.g. in the way rusty proposed.
-Andi
WARNING: multiple messages have this Message-ID (diff)
From: Andi Kleen <ak@suse.de>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Steven Rostedt <rostedt@goodmis.org>,
LKML <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@osdl.org>, Linus Torvalds <torvalds@osdl.org>,
Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
Martin Mares <mj@atrey.karlin.mff.cuni.cz>,
bjornw@axis.com, schwidefsky@de.ibm.com,
benedict.gaster@superh.com, lethal@linux-sh.org,
Chris Zankel <chris@zankel.net>,
Marc Gauthier <marc@tensilica.com>,
Joe Taylor <joe@tensilica.com>,
David Mosberger-Tang <davidm@hpl.hp.com>,
rth@twiddle.net, spyro@f2s.com, starvik@axis.com,
tony.luck@intel.com, linux-ia64@vger.kernel.org,
ralf@linux-mips.org, linux-mips@linux-mips.org,
grundler@parisc-linux.org, parisc-linux@parisc-linux.org,
linuxppc-dev@ozlabs.org, paulus@samba.org, linux390@de.ibm.com,
davem@davemloft.net
Subject: Re: [PATCH 00/05] robust per_cpu allocation for modules
Date: Mon, 17 Apr 2006 19:10:46 +0200 [thread overview]
Message-ID: <200604171910.48838.ak@suse.de> (raw)
In-Reply-To: <4441ECE6.5010709@yahoo.com.au>
On Sunday 16 April 2006 09:06, Nick Piggin wrote:
> I still don't understand what the justification is for slowing down
> this critical bit of infrastructure for something that is only a
> problem in the -rt patchset, and even then only a problem when tracing
> is enabled.
There are actually problems outside -rt. e.g. the Xen kernel was running
into a near overflow and as more and more code is using per cpu variables
others might too.
I'm confident the problem can be solved without adding more variables
though - e.g. in the way rusty proposed.
-Andi
WARNING: multiple messages have this Message-ID (diff)
From: Andi Kleen <ak@suse.de>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Andrew Morton <akpm@osdl.org>,
linux-mips@linux-mips.org,
David Mosberger-Tang <davidm@hpl.hp.com>,
linux-ia64@vger.kernel.org,
Martin Mares <mj@atrey.karlin.mff.cuni.cz>,
spyro@f2s.com, Joe Taylor <joe@tensilica.com>,
linuxppc-dev@ozlabs.org, paulus@samba.org,
benedict.gaster@superh.com, bjornw@axis.com,
Ingo Molnar <mingo@elte.hu>,
grundler@parisc-linux.org, Steven Rostedt <rostedt@goodmis.org>,
starvik@axis.com, Linus Torvalds <torvalds@osdl.org>,
Thomas Gleixner <tglx@linutronix.de>,
rth@twiddle.net, Chris Zankel <chris@zankel.net>,
tony.luck@intel.com, LKML <linux-kernel@vger.kernel.org>,
ralf@linux-mips.org, Marc Gauthier <marc@tensilica.com>,
lethal@linux-sh.org, schwidefsky@de.ibm.com, linux390@de.ibm.com,
davem@davemloft.net, parisc-linux@parisc-linux.org
Subject: Re: [PATCH 00/05] robust per_cpu allocation for modules
Date: Mon, 17 Apr 2006 19:10:46 +0200 [thread overview]
Message-ID: <200604171910.48838.ak@suse.de> (raw)
In-Reply-To: <4441ECE6.5010709@yahoo.com.au>
On Sunday 16 April 2006 09:06, Nick Piggin wrote:
> I still don't understand what the justification is for slowing down
> this critical bit of infrastructure for something that is only a
> problem in the -rt patchset, and even then only a problem when tracing
> is enabled.
There are actually problems outside -rt. e.g. the Xen kernel was running
into a near overflow and as more and more code is using per cpu variables
others might too.
I'm confident the problem can be solved without adding more variables
though - e.g. in the way rusty proposed.
-Andi
next prev parent reply other threads:[~2006-04-17 17:10 UTC|newest]
Thread overview: 97+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-14 21:18 [PATCH 00/05] robust per_cpu allocation for modules Steven Rostedt
2006-04-14 21:18 ` Steven Rostedt
2006-04-14 21:18 ` Steven Rostedt
2006-04-14 21:18 ` Steven Rostedt
2006-04-14 22:06 ` Andrew Morton
2006-04-14 22:06 ` Andrew Morton
2006-04-14 22:06 ` Andrew Morton
2006-04-14 22:12 ` Steven Rostedt
2006-04-14 22:12 ` Steven Rostedt
2006-04-14 22:12 ` Steven Rostedt
2006-04-14 22:12 ` Chen, Kenneth W
2006-04-14 22:12 ` Chen, Kenneth W
2006-04-14 22:12 ` Chen, Kenneth W
2006-04-14 22:12 ` Chen, Kenneth W
2006-04-14 22:19 ` Steven Rostedt
2006-04-15 3:10 ` [PATCH 00/08] robust per_cpu allocation for modules - V2 Steven Rostedt
2006-04-15 3:10 ` Steven Rostedt
2006-04-15 3:10 ` Steven Rostedt
2006-04-15 5:32 ` [PATCH 00/05] robust per_cpu allocation for modules Nick Piggin
2006-04-15 5:32 ` Nick Piggin
2006-04-15 5:32 ` Nick Piggin
2006-04-15 20:17 ` Steven Rostedt
2006-04-15 20:17 ` Steven Rostedt
2006-04-15 20:17 ` Steven Rostedt
2006-04-16 2:47 ` Nick Piggin
2006-04-16 2:47 ` Nick Piggin
2006-04-16 2:47 ` Nick Piggin
2006-04-16 3:53 ` Steven Rostedt
2006-04-16 3:53 ` Steven Rostedt
2006-04-16 3:53 ` Steven Rostedt
2006-04-16 7:02 ` Paul Mackerras
2006-04-16 7:02 ` Paul Mackerras
2006-04-16 7:02 ` Paul Mackerras
2006-04-16 13:40 ` Steven Rostedt
2006-04-16 13:40 ` Steven Rostedt
2006-04-16 13:40 ` Steven Rostedt
2006-04-16 13:40 ` Steven Rostedt
2006-04-16 14:03 ` Sam Ravnborg
2006-04-16 14:03 ` Sam Ravnborg
2006-04-16 14:03 ` Sam Ravnborg
2006-04-16 15:34 ` Arnd Bergmann
2006-04-16 15:34 ` Arnd Bergmann
2006-04-16 15:34 ` Arnd Bergmann
2006-04-16 18:03 ` Tony Luck
2006-04-16 18:03 ` Tony Luck
2006-04-16 18:03 ` Tony Luck
2006-04-17 0:45 ` Steven Rostedt
2006-04-17 0:45 ` Steven Rostedt
2006-04-17 0:45 ` Steven Rostedt
2006-04-17 2:07 ` Arnd Bergmann
2006-04-17 2:07 ` Arnd Bergmann
2006-04-17 2:07 ` Arnd Bergmann
2006-04-17 2:17 ` Steven Rostedt
2006-04-17 2:17 ` Steven Rostedt
2006-04-17 2:17 ` Steven Rostedt
2006-04-17 20:06 ` Ravikiran G Thirumalai
2006-04-17 20:06 ` Ravikiran G Thirumalai
2006-04-17 20:06 ` Ravikiran G Thirumalai
2006-04-17 6:47 ` Rusty Russell
2006-04-17 6:47 ` Rusty Russell
2006-04-17 6:47 ` Rusty Russell
2006-04-17 11:33 ` Steven Rostedt
2006-04-17 11:33 ` Steven Rostedt
2006-04-17 11:33 ` Steven Rostedt
2006-04-16 7:06 ` Nick Piggin
2006-04-16 7:06 ` Nick Piggin
2006-04-16 7:06 ` Nick Piggin
2006-04-16 16:06 ` Steven Rostedt
2006-04-16 16:06 ` Steven Rostedt
2006-04-16 16:06 ` Steven Rostedt
2006-04-17 17:10 ` Andi Kleen [this message]
2006-04-17 17:10 ` Andi Kleen
2006-04-17 17:10 ` Andi Kleen
2006-04-17 16:55 ` Christoph Lameter
2006-04-17 16:55 ` Christoph Lameter
2006-04-17 16:55 ` Christoph Lameter
2006-04-17 22:02 ` Ravikiran G Thirumalai
2006-04-17 22:02 ` Ravikiran G Thirumalai
2006-04-17 22:02 ` Ravikiran G Thirumalai
2006-04-17 23:44 ` Steven Rostedt
2006-04-17 23:44 ` Steven Rostedt
2006-04-17 23:44 ` Steven Rostedt
2006-04-17 23:48 ` Christoph Lameter
2006-04-17 23:48 ` Christoph Lameter
2006-04-17 23:48 ` Christoph Lameter
2006-04-18 1:51 ` Steven Rostedt
2006-04-18 1:51 ` Steven Rostedt
2006-04-18 1:51 ` Steven Rostedt
2006-04-18 6:42 ` Nick Piggin
2006-04-18 6:42 ` Nick Piggin
2006-04-18 6:42 ` Nick Piggin
2006-04-18 12:47 ` Steven Rostedt
2006-04-18 12:47 ` Steven Rostedt
2006-04-18 12:47 ` Steven Rostedt
2006-04-16 6:35 ` Paul Mackerras
2006-04-16 6:35 ` Paul Mackerras
2006-04-16 6:35 ` Paul Mackerras
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