From: Dave Hansen <dave.hansen@intel.com>
To: Alexander Graf <agraf@suse.de>, linux-mm@kvack.org
Cc: linux-kernel@vger.kernel.org, Rik van Riel <riel@redhat.com>,
Mel Gorman <mgorman@suse.de>,
Andrew Morton <akpm@linux-foundation.org>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@kernel.org>, Hugh Dickins <hughd@google.com>,
Izik Eidus <izik.eidus@ravellosystems.com>,
Andrea Arcangeli <aarcange@redhat.com>
Subject: Re: [PATCH] ksm: Expose configuration via sysctl
Date: Tue, 25 Feb 2014 09:34:59 -0800 [thread overview]
Message-ID: <530CD443.7010400@intel.com> (raw)
In-Reply-To: <1393284484-27637-1-git-send-email-agraf@suse.de>
On 02/24/2014 03:28 PM, Alexander Graf wrote:
> Configuration of tunables and Linux virtual memory settings has traditionally
> happened via sysctl. Thanks to that there are well established ways to make
> sysctl configuration bits persistent (sysctl.conf).
>
> KSM introduced a sysfs based configuration path which is not covered by user
> space persistent configuration frameworks.
>
> In order to make life easy for sysadmins, this patch adds all access to all
> KSM tunables via sysctl as well. That way sysctl.conf works for KSM as well,
> giving us a streamlined way to make KSM configuration persistent.
Doesn't this essentially mean "don't use sysfs for configuration"?
Seems like at least /sys/kernel/mm/transparent_hugepage would need the
same treatment.
Couldn't we also (maybe in parallel) just teach the sysctl userspace
about sysfs? This way we don't have to do parallel sysctls and sysfs
for *EVERYTHING* in the kernel:
sysfs.kernel.mm.transparent_hugepage.enabled=enabled
Or do we just say "sysctls are the way to go for anything that might
need to be persistent, don't use sysfs"?
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next prev parent reply other threads:[~2014-02-25 17:36 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-24 23:28 [PATCH] ksm: Expose configuration via sysctl Alexander Graf
2014-02-25 12:33 ` Rik van Riel
2014-02-25 17:15 ` Johannes Weiner
2014-02-25 17:19 ` Peter Zijlstra
2014-02-25 23:16 ` Alexander Graf
2014-02-25 23:50 ` Kay Sievers
2014-02-26 1:05 ` Hugh Dickins
2014-02-26 7:49 ` Alexander Graf
2014-02-25 17:34 ` Dave Hansen [this message]
2014-02-25 23:09 ` Alexander Graf
2014-02-26 0:10 ` Dave Hansen
2014-02-26 15:36 ` Sven-Haegar Koch
2014-02-26 17:32 ` Alexander Graf
2014-02-26 0:02 ` Kay Sievers
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