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From: Mathieu Desnoyers <compudj@krystal.dyndns.org>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Andrew Morton <akpm@osdl.org>,
	Greg Kroah-Hartman <gregkh@suse.de>,
	linux-kernel@vger.kernel.org,
	Christoph Hellwig <hch@infradead.org>,
	Linus Torvalds <torvalds@osdl.org>,
	Ingo Molnar <mingo@redhat.com>,
	ltt-dev@shafik.org, systemtap@sources.redhat.com,
	Thomas Gleixner <tglx@linutronix.de>,
	Douglas Niehaus <niehaus@eecs.ku.edu>
Subject: Re: [PATCH 05/05] Linux Kernel Markers, non optimised architectures
Date: Fri, 12 Jan 2007 12:43:12 -0500	[thread overview]
Message-ID: <20070112174312.GA22771@Krystal> (raw)
In-Reply-To: <20070112171512.GB2888@Krystal>

* Mathieu Desnoyers (mathieu.desnoyers@polymtl.ca) wrote:
> > 
> > OK, well one problem is that it can cause a resched event to be lost, so
> > you might say it has more side-effects without checking resched.
> > 
[...]
> If we are sure that we expect calls to preempt_schedule() from each of these
> contexts, then it's ok to put preempt_enable(). It is important to note that a
> marker would then act as a source of scheduler events in code paths where
> disabling interrupts is expected to disable the scheduler.
> 

Sorry for self-reply, but the above mentioned issue is dealt by the
irqs_disabled() check at the beginning of preempt_schedule().

Mathieu


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  reply	other threads:[~2007-01-12 17:43 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-01-12  0:02 [PATCH 00/05] Linux Kernel Markers Mathieu Desnoyers
2007-01-12  0:02 ` [PATCH 01/05] Linux Kernel Markers : Kconfig menus Mathieu Desnoyers
2007-01-12  0:02 ` [PATCH 02/05] Linux Kernel Markers, architecture independant code Mathieu Desnoyers
2007-01-12  0:02 ` [PATCH 03/05] Linux Kernel Markers : powerpc optimisation Mathieu Desnoyers
2007-01-12  0:02 ` [PATCH 04/05] Linux Kernel Markers : i386 optimisation Mathieu Desnoyers
2007-01-12  0:02 ` [PATCH 05/05] Linux Kernel Markers, non optimised architectures Mathieu Desnoyers
2007-01-12  4:39   ` Nick Piggin
2007-01-12  5:00     ` Mathieu Desnoyers
2007-01-12  5:09       ` Nick Piggin
2007-01-12 17:15         ` Mathieu Desnoyers
2007-01-12 17:43           ` Mathieu Desnoyers [this message]
2007-01-12 18:23         ` [PATCH 05/05] update - " Mathieu Desnoyers

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