linux-kernel - Re: [PATCH] [9/16] HWPOISON: Use bitmask/action code for try_to

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Message-ID: <874ov5fvm6.fsf@basil.nowhere.org>
Date:	Thu, 28 May 2009 11:02:41 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Nick Piggin <npiggin@...e.de>
Cc:	Lee.Schermerhorn@...com, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	fengguang.wu@...el.com
Subject: Re: [PATCH] [9/16] HWPOISON: Use bitmask/action code for try_to_unmap behaviour

Nick Piggin <npiggin@...e.de> writes:

> There are a set of "actions" which is what the callers are, then a
> set of modifiers. Just make it all modifiers and the callers can
> use things that are | together.

The actions are typically contradictory in some way, that is why
I made them "actions". The modifiers are all things that could
be made into flags in a straightforward way.

Probably it could be all turned into flags, but that would
make the patch much more intrusive for rmap.c than it currently is,
with some restructuring needed, which I didn't want to do.

Hwpoison in general is designed to not be intrusive.

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
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