From: Chris Metcalf <cmetcalf@tilera.com>
To: Henrik Austad <henrik@austad.us>
Cc: <linux-kernel@vger.kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
John Stultz <john.stultz@linaro.org>
Subject: Re: [PATCH] tile: add clock_gettime support to vDSO
Date: Thu, 2 Oct 2014 10:17:17 -0400 [thread overview]
Message-ID: <542D5E6D.5040908@tilera.com> (raw)
In-Reply-To: <20141001212439.GA12974@sisyphus.home.austad.us>
On 10/1/2014 5:24 PM, Henrik Austad wrote:
> On Tue, Sep 30, 2014 at 03:29:45PM -0400, Chris Metcalf wrote:
>> >This change adds support for clock_gettime with CLOCK_REALTIME
>> >and CLOCK_MONOTONIC using vDSO. In addition, with this change
>> >we switch to use seqlocks instead of integer counters.
>> >
>> >We also support the *_COARSE clockid_t, for apps that want speed
>> >but aren't concerned about fine-grained timestamps; this saves
>> >about 20 cycles per call (seehttp://lwn.net/Articles/342018/).
>> >
>> >Signed-off-by: Chris Metcalf<cmetcalf@tilera.com>
> What rev is this based on? When I apply it to Linus latest (aad7fb916), it
> fails in arch/tile/kernel/time.c and arch/tile/kernel/vdso/vgettimeofday.c
> (see below)
It's based on the linux-tile tree (on kernel.org under cmetcalf/linux-tile.git), which was last synced up at 3.16-rc7. I'll refresh the tree to pick up Thomas's recent changes that were queued for 3.17. Thanks.
--
Chris Metcalf, Tilera Corp.
http://www.tilera.com
next prev parent reply other threads:[~2014-10-02 14:17 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-30 19:29 [PATCH] tile: add clock_gettime support to vDSO Chris Metcalf
2014-09-30 22:17 ` Thomas Gleixner
2014-09-30 22:30 ` John Stultz
2014-10-01 20:48 ` [PATCH v2 1/2] tile: switch to using seqlocks for the vDSO time code Chris Metcalf
2014-10-01 21:02 ` [PATCH v2 2/2] tile: add clock_gettime support to vDSO Chris Metcalf
2014-10-01 21:24 ` [PATCH] " Henrik Austad
2014-10-02 14:17 ` Chris Metcalf [this message]
2014-10-02 14:32 ` [PATCH v3 2/2] " Chris Metcalf
2014-10-02 17:41 ` John Stultz
2014-10-02 14:48 ` [PATCH v3 1/2] tile: switch to using seqlocks for the vDSO time code Chris Metcalf
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