Re: [PATCH] sysctl: Add a feature to drop caches selectively

Bernd Schubert
2014-06-26T10:37:00Z

On 06/26/2014 08:13 AM, Artem Bityutskiy wrote:
> On Thu, 2014-06-26 at 11:06 +1000, Dave Chinner wrote:
>> Your particular use case can be handled by directing your benchmark
>> at a filesystem mount point and unmounting the filesystem in between
>> benchmark runs. There is no ned to adding kernel functionality for
>> somethign that can be so easily acheived by other means, especially
>> in benchmark environments where *everything* is tightly controlled.
>
> If I was a benchmark writer, I would not be willing running it as root
> to be able to mount/unmount, I would not be willing to require the
> customer creating special dedicated partitions for the benchmark,
> because this is too user-unfriendly. Or do I make incorrect assumptions?

But why a sysctl then? And also don't see a point for that at all, why
can't the benchmark use posix_fadvise(POSIX_FADV_DONTNEED)?

Cheers,
Bernd