Re: [PATCH resend] drop_caches: add some documentation and infomessage

From: Andrew Morton
Date: Tue Jul 30 2013 - 11:08:53 EST

On Tue, 30 Jul 2013 07:47:12 -0700 Dave Hansen <dave.hansen@xxxxxxxxx> 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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