From: Jens Axboe <axboe@kernel.dk>
To: Stephane Gasparini <stephane.gasparini@intel.com>,
linux-block@vger.kernel.org, linux-pm@vger.kernel.org,
lenb@kernel.org, srinivas.pandruvada@linux.intel.com
Cc: Stephane Gasparini <stephane.gasparini@linux.intel.com>,
len.brown@linux.intel.com, philippe.longepe@linux.intel.com
Subject: Re: [PATCH 1/1] kernel/fs: fix I/O wait not accounted for RW O_DSYNC
Date: Tue, 9 Feb 2016 09:27:34 -0700 [thread overview]
Message-ID: <56BA1376.8080505@kernel.dk> (raw)
In-Reply-To: <1455034058-84181-2-git-send-email-stephane.gasparini@intel.com>
On 02/09/2016 09:07 AM, Stephane Gasparini wrote:
> From: Stephane Gasparini <stephane.gasparini@linux.intel.com>
>
> When a process is doing Random Write with O_DSYNC flag
> the I/O wait are not accounted in the kernel (get_cpu_iowait_time_us).
> This is preventing the governor or the cpufreq driver to account for
> I/O wait and thus use the right pstate
Applied, thanks.
--
Jens Axboe
prev parent reply other threads:[~2016-02-09 16:27 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-09 16:07 [PATCH 0/1] account I/O Wait during synchronous write Stephane Gasparini
2016-02-09 16:07 ` [PATCH 1/1] kernel/fs: fix I/O wait not accounted for RW O_DSYNC Stephane Gasparini
2016-02-09 16:27 ` Jens Axboe [this message]
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