lkml.org 
[lkml]   [2019]   [Apr]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v2 2/2] perf/x86/intel: force resched when TFA sysctl is modified
On Mon, Apr 08, 2019 at 10:32:52AM -0700, Stephane Eranian wrote:
> +static ssize_t set_sysctl_tfa(struct device *cdev,
> + struct device_attribute *attr,
> + const char *buf, size_t count)
> +{
> + bool val;
> + ssize_t ret;
> +
> + ret = kstrtobool(buf, &val);
> + if (ret)
> + return ret;
> +
> + /* no change */
> + if (val == allow_tsx_force_abort)
> + return count;
> +
> + allow_tsx_force_abort = val;
> +
> + get_online_cpus();
> + on_each_cpu(update_tfa_sched, NULL, 1);
> + put_online_cpus();
> +
> + return count;
> +}

So we care about concurrent writing to that file?

\
 
 \ /
  Last update: 2019-04-15 17:58    [W:0.074 / U:4.832 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site