From: Andrew Morton <akpm@linux-foundation.org>
To: Dave Hansen <dave.hansen@intel.com>
Cc: Michal Hocko <mhocko@suse.cz>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
kosaki.motohiro@jp.fujitsu.com, kamezawa.hiroyu@jp.fujitsu.com,
bp@suse.de, Dave Hansen <dave@linux.vnet.ibm.com>
Subject: Re: [PATCH resend] drop_caches: add some documentation and info message
Date: Tue, 30 Jul 2013 08:08:10 -0700 [thread overview]
Message-ID: <20130730080810.9a0a2d71.akpm@linux-foundation.org> (raw)
In-Reply-To: <51F7D1F0.20309@intel.com>
On Tue, 30 Jul 2013 07:47:12 -0700 Dave Hansen <dave.hansen@intel.com> wrote:
> On 07/30/2013 05:55 AM, Michal Hocko wrote:
> >> > If we add another flag in the future it can use bit 3?
> > What if we get crazy and need more of them?
>
> I really hate using bits for these kinds of interfaces. I'm forgetful
> and never remember which bit is which, and they're possible to run out of.
>
> I'm not saying do it now, but we can switch over to:
>
> echo 'slab|pagecache' > drop_caches
> or
> echo 'quiet|slab' > drop_caches
>
> any time we want and still have compatibility with the existing bitwise
> interface.
/bin/drop_caches "slab|pagecache"
That we always insist on doing such things in the kernel instead is
exhibit #1 in Why We Suck.
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next prev parent reply other threads:[~2013-07-30 15:08 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-26 12:44 [PATCH resend] drop_caches: add some documentation and info message Michal Hocko
2013-07-26 21:37 ` Johannes Weiner
2013-07-29 20:57 ` Andrew Morton
2013-07-30 7:45 ` Michal Hocko
2013-07-30 8:25 ` Andrew Morton
2013-07-30 12:55 ` Michal Hocko
2013-07-30 14:39 ` Andrew Morton
2013-07-30 14:47 ` Michal Hocko
2013-07-30 14:47 ` Dave Hansen
2013-07-30 14:54 ` Borislav Petkov
2013-07-30 15:08 ` Andrew Morton [this message]
2013-08-01 3:11 ` KOSAKI Motohiro
2013-08-01 3:17 ` Andrew Morton
2013-08-02 1:39 ` KOSAKI Motohiro
2013-08-02 7:33 ` Michal Hocko
2013-08-03 20:16 ` KOSAKI Motohiro
2013-08-04 8:07 ` Michal Hocko
2013-08-05 1:13 ` KOSAKI Motohiro
2013-08-05 7:20 ` Michal Hocko
2013-09-17 15:14 ` Johannes Weiner
2013-08-02 16:04 ` Rob Landley
2013-08-02 17:10 ` Dave Hansen
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