From: Arun Sharma <asharma@fb.com>
To: Arun Sharma <asharma@fb.com>
Cc: <linux-kernel@vger.kernel.org>, Kumar Sundararajan <kumar@fb.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
john stultz <johnstul@us.ibm.com>, Andy Lutomirski <luto@MIT.EDU>,
Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: [PATCH 2/2] Add a thread cpu time implementation to vDSO
Date: Mon, 19 Dec 2011 11:58:10 -0800 [thread overview]
Message-ID: <4EEF9752.1020404@fb.com> (raw)
In-Reply-To: <1324324293-10390-3-git-send-email-asharma@fb.com>
On 12/19/11 11:51 AM, Arun Sharma wrote:
> +/* Should be optimized away at compile time */
> +static noinline int check_vvar_overflow(void)
> +{
> + long vcpu_data_offset = (long) vvaraddr_vcpu_data - VVAR_ADDRESS;
> + size_t size = (vcpu_data_offset + sizeof(vcpu_data)
> + + sizeof(struct vpercpu_data) * CONFIG_NR_CPUS);
> + return (size> VVAR_NUM_PAGES * PAGE_SIZE);
> +}
Forgot to drop the "noinline" part (which I had added for debug
purposes, so I could inspect the generated code). Fixed in my repo.
-Arun
next prev parent reply other threads:[~2011-12-19 19:58 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-19 19:51 [PATCH 0/2] Add a thread cpu time implementation to vDSO (v2) Arun Sharma
2011-12-19 19:51 ` [PATCH 1/2] Extend VVAR support to multiple pages Arun Sharma
2011-12-19 19:51 ` [PATCH 2/2] Add a thread cpu time implementation to vDSO Arun Sharma
2011-12-19 19:58 ` Arun Sharma [this message]
-- strict thread matches above, loose matches on Subject: below --
2011-12-12 19:36 [PATCH 0/2] " Arun Sharma
2011-12-12 19:36 ` [PATCH 2/2] " Arun Sharma
2011-12-12 20:13 ` Eric Dumazet
2011-12-12 21:19 ` Arun Sharma
2011-12-12 21:27 ` Eric Dumazet
2011-12-12 21:33 ` Andrew Lutomirski
2011-12-12 22:14 ` Arun Sharma
2011-12-13 8:52 ` Peter Zijlstra
2011-12-13 18:15 ` Arun Sharma
2011-12-13 18:53 ` Peter Zijlstra
2011-12-12 20:15 ` Andrew Lutomirski
2011-12-12 22:49 ` Arun Sharma
2011-12-12 23:01 ` Andrew Lutomirski
2011-12-13 0:40 ` Arun Sharma
2011-12-12 23:09 ` john stultz
2011-12-12 23:20 ` Arun Sharma
2011-12-12 23:32 ` john stultz
2011-12-12 23:41 ` Andrew Lutomirski
2011-12-12 23:52 ` john stultz
2011-12-13 0:26 ` Arun Sharma
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