From: David Hildenbrand <dahi@linux.vnet.ibm.com>
To: "LF.Tan" <lftan.linux@gmail.com>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Linux-Arch <linux-arch@vger.kernel.org>,
benh@kernel.crashing.org, paulus@samba.org,
akpm@linux-foundation.org, heiko.carstens@de.ibm.com,
schwidefsky@de.ibm.com, borntraeger@de.ibm.com,
"Michael S. Tsirkin" <mst@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
David.Laight@aculab.com, peterz@infradead.org, hughd@google.com,
hocko@suse.cz
Subject: Re: [PATCH v2 1/5] uaccess: add pagefault_count to thread_info
Date: Mon, 15 Dec 2014 12:23:01 +0100 [thread overview]
Message-ID: <20141215122301.0eac5f19@thinkpad-w530> (raw)
In-Reply-To: <CAFiDJ59Y9y4VrcVfyo8rrQV-NtM=1G=kQScBtEvnuC3MpXt0KA@mail.gmail.com>
> On Wed, Dec 10, 2014 at 10:23 PM, David Hildenbrand
> <dahi@linux.vnet.ibm.com> wrote:
> > This patch adds the pagefault_count to the thread_info of all
> > architectures. It will be used to count the pagefault_disable() levels
> > on a per-thread basis.
> >
> > We are not reusing the preempt_count as this is per cpu on x86 and we want to
> > demangle pagefault_disable() from preemption in the future.
> >
> > The new counter is added directly below the preempt_count, except for archs
> > relying on a manual calculation of asm offsets - to minimize the changes.
> >
> Hi David
>
> Is this patchset targeted for 3.19? If yes, then we need this for
> arch/nios2 as well (new arch in 3.19).
>
Hi,
Peter just showed my that there is some work ongoing on that
pagefault_disable() topic. So I am not sure if the arch-specific part of this
series is still relevant.
But thanks for the info!
David
next prev parent reply other threads:[~2014-12-15 16:32 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-10 14:23 [PATCH v2 0/5] Reenable might_sleep() checks for might_fault() David Hildenbrand
2014-12-10 14:23 ` David Hildenbrand
2014-12-10 14:23 ` [PATCH v2 1/5] uaccess: add pagefault_count to thread_info David Hildenbrand
2014-12-10 14:23 ` David Hildenbrand
2014-12-15 10:07 ` LF.Tan
2014-12-15 11:23 ` David Hildenbrand [this message]
2014-12-15 12:48 ` Peter Zijlstra
2014-12-10 14:23 ` [PATCH v2 2/5] uaccess: count pagefault_disable() levels in pagefault_count David Hildenbrand
2014-12-10 14:23 ` David Hildenbrand
2014-12-10 14:23 ` [PATCH v2 3/5] mm, uaccess: trigger might_sleep() in might_fault() when pagefaults are disabled David Hildenbrand
2014-12-10 14:23 ` [PATCH v2 4/5] uaccess: clarify that uaccess may only sleep if pagefaults are not disabled David Hildenbrand
2014-12-10 14:23 ` David Hildenbrand
2014-12-10 14:23 ` [PATCH v2 5/5] uaccess: CONFIG_DEBUG_PAGEFAULT_COUNT to debug pagefault_count David Hildenbrand
2014-12-10 14:23 ` David Hildenbrand
2014-12-15 10:45 ` [PATCH v2 0/5] Reenable might_sleep() checks for might_fault() Peter Zijlstra
2014-12-15 11:21 ` David Hildenbrand
2014-12-15 12:50 ` Peter Zijlstra
2014-12-15 13:08 ` David Hildenbrand
2015-01-12 14:19 ` David Hildenbrand
2015-01-30 15:52 ` Christian Borntraeger
2015-02-09 14:42 ` Peter Zijlstra
2015-02-19 14:48 ` David Hildenbrand
2015-02-19 15:07 ` Peter Zijlstra
2015-02-19 15:14 ` David Hildenbrand
2015-03-27 15:40 ` David Hildenbrand
2015-03-27 15:40 ` David Hildenbrand
2015-03-27 16:15 ` Peter Zijlstra
2015-03-27 19:05 ` David Hildenbrand
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