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

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Message-ID: <20090528080319.GA1065@one.firstfloor.org>
Date:	Thu, 28 May 2009 10:03:19 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Nick Piggin <npiggin@...e.de>
Cc:	Andi Kleen <andi@...stfloor.org>, 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

On Thu, May 28, 2009 at 09:27:03AM +0200, Nick Piggin wrote:
> Not a bad idea, but I would prefer to have a set of flags which tell
> try_to_unmap what to do, and then combine them with #defines for
> callers. Like gfp flags.

That's exactly what the patch does?

It just has actions and flags because the actions can be contradictory.

> And just use regular bitops rather than this TTU_ACTION macro.

TTU_ACTION does mask against multiple bits. None of the regular
bitops do that. 

-Andi

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