linux-kernel - Re: [PATCH 2/4] mm: Send a single IPI to TLB flush multiple pages when unmapping

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Message-ID: <20150415222006.GS2366@two.firstfloor.org>
Date:	Thu, 16 Apr 2015 00:20:06 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Mel Gorman <mgorman@...e.de>
Cc:	Linux-MM <linux-mm@...ck.org>, Rik van Riel <riel@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Dave Hansen <dave.hansen@...el.com>,
	Andi Kleen <andi@...stfloor.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/4] mm: Send a single IPI to TLB flush multiple pages
 when unmapping

I did a quick read and it looks good to me.

It's a bit ugly to bloat current with the ubc pointer,
but i guess there's no good way around that.

Also not nice to use GFP_ATOMIC for the allocation,
but again there's no way around it and it will
eventually recover if it fails. There may be
a slightly better GFP flag for this situation that
doesn't dip into the interrupt pools?

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