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

From: Borislav Petkov
Date: Tue Jul 30 2013 - 10:54:15 EST

On Tue, Jul 30, 2013 at 07:47:12AM -0700, Dave Hansen 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.

Hohum, definitely a nice idea at a first glance. And when you cat
drop_caches, it could show you what all those commands mean and how you
can issue them, i.e. allowed syntax etc.


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