linux-kernel - Re: [PATCH 17/20] dm: get rid of superfluous gfp flags

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Date:	Mon, 2 May 2016 09:31:11 +0200
From:	Michal Hocko <mhocko@...nel.org>
To:	Mike Snitzer <snitzer@...hat.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>, linux-mm@...ck.org,
	dm-devel@...hat.com, Mikulas Patocka <mpatocka@...hat.com>,
	Shaohua Li <shli@...nel.org>
Subject: Re: [PATCH 17/20] dm: get rid of superfluous gfp flags

On Fri 29-04-16 14:54:52, Mike Snitzer wrote:
> On Thu, Apr 28 2016 at  9:24am -0400,
> Michal Hocko <mhocko@...nel.org> wrote:
> 
> > From: Michal Hocko <mhocko@...e.com>
> > 
> > copy_params seems to be little bit confused about which allocation flags
> > to use. It enforces GFP_NOIO even though it uses
> > memalloc_noio_{save,restore} which enforces GFP_NOIO at the page
> > allocator level automatically (via memalloc_noio_flags). It also
> > uses __GFP_REPEAT for the __vmalloc request which doesn't make much
> > sense either because vmalloc doesn't rely on costly high order
> > allocations. Let's just drop the __GFP_REPEAT and leave the further
> > cleanup to later changes.
> > 
> > Cc: Shaohua Li <shli@...nel.org>
> > Cc: Mikulas Patocka <mpatocka@...hat.com>
> > Cc: dm-devel@...hat.com
> > Signed-off-by: Michal Hocko <mhocko@...e.com>
> 
> I've taken this patch for 4.7 but editted the header, see:
> https://git.kernel.org/cgit/linux/kernel/git/device-mapper/linux-dm.git/commit/?h=dm-4.7&id=0222c76e96163355620224625c1cd80991086dc7

Thanks!

-- 
Michal Hocko
SUSE Labs