From: John Stultz <john.stultz@linaro.org>
To: Jiri Slaby <jirislaby@gmail.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Joe Perches <joe@perches.com>,
Michal Nazarewicz <mina86@mina86.com>,
Andy Whitcroft <apw@canonical.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
David Rientjes <rientjes@google.com>,
Dave Hansen <dave@linux.vnet.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org
Subject: Re: [PATCH 2/3] printk: Add %ptc to safely print a task's comm
Date: Tue, 17 May 2011 15:17:46 -0700 [thread overview]
Message-ID: <1305670666.2915.128.camel@work-vm> (raw)
In-Reply-To: <4DD2EBAB.5080004@gmail.com>
On Tue, 2011-05-17 at 23:42 +0200, Jiri Slaby wrote:
> On 05/17/2011 10:47 PM, John Stultz wrote:
> > +static noinline_for_stack
>
> I still fail to see why this should be slowed down by noinlining it.
> Care to explain?
Just that I was hesitant to change it without consensus and it follows
the convention of other similarly called functions.
> With my setup, the code below inlined will use 32 bytes of stack. The
> same as %pK case. Uninlined it obviously eats "only" 8 bytes for IP.
Maybe could we defer that discussion into a following patch, which maybe
does a similar analysis on the other noinline_for_stack usage in that
case?
(And I may be dropping the whole series here in a bit, so more debate on
it might be moot)
thanks
-john
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next prev parent reply other threads:[~2011-05-17 22:17 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-17 20:47 [PATCH 0/3] v5 Improve task->comm locking situation John Stultz
2011-05-17 20:47 ` [PATCH 1/3] comm: Introduce comm_lock spinlock to protect task->comm access John Stultz
2011-05-17 21:27 ` Ingo Molnar
2011-05-17 21:54 ` Peter Zijlstra
2011-05-17 22:56 ` David Rientjes
2011-05-18 0:53 ` KOSAKI Motohiro
2011-05-17 22:27 ` John Stultz
2011-05-18 1:02 ` KOSAKI Motohiro
2011-05-17 20:47 ` [PATCH 2/3] printk: Add %ptc to safely print a task's comm John Stultz
2011-05-17 21:42 ` Jiri Slaby
2011-05-17 21:52 ` Joe Perches
2011-05-17 22:04 ` Jiri Slaby
2011-05-17 22:17 ` Joe Perches
2011-05-17 22:17 ` John Stultz [this message]
2011-05-17 20:47 ` [PATCH 3/3] checkpatch.pl: Add check for task comm references John Stultz
2011-05-17 20:58 ` Jiri Slaby
2011-05-17 21:04 ` Michal Nazarewicz
-- strict thread matches above, loose matches on Subject: below --
2011-05-16 21:19 [PATCH 0/3] v4 Improve task->comm locking situation John Stultz
2011-05-16 21:19 ` [PATCH 2/3] printk: Add %ptc to safely print a task's comm John Stultz
2011-05-16 21:54 ` Jiri Slaby
2011-05-16 23:10 ` John Stultz
2011-05-16 23:56 ` Joe Perches
2011-05-17 0:11 ` John Stultz
2011-05-17 7:21 ` Jiri Slaby
2011-05-18 0:32 ` KOSAKI Motohiro
2011-05-12 23:02 [PATCH 0/3] v3 Improve task->comm locking situation John Stultz
2011-05-12 23:02 ` [PATCH 2/3] printk: Add %ptc to safely print a task's comm John Stultz
2011-05-11 0:23 [RFC][PATCH 0/3] v2 Improve task->comm locking situation John Stultz
2011-05-11 0:23 ` [PATCH 2/3] printk: Add %ptc to safely print a task's comm John Stultz
2011-05-11 0:51 ` Joe Perches
2011-05-11 1:10 ` John Stultz
2011-05-11 1:16 ` john stultz
2011-05-11 1:20 ` Joe Perches
2011-05-12 22:12 ` David Rientjes
2011-05-12 22:29 ` Joe Perches
2011-05-13 21:56 ` David Rientjes
2011-05-12 22:10 ` David Rientjes
2011-05-11 9:33 ` Américo Wang
2011-05-11 21:02 ` John Stultz
2011-05-12 10:43 ` Américo Wang
2011-05-12 10:45 ` Américo Wang
2011-05-12 18:01 ` John Stultz
2011-05-11 17:36 ` Andi Kleen
2011-05-11 21:04 ` John Stultz
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