linux-kernel - Re: [PATCH] MM: discard __GFP

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Message-ID: <20211118132753.GB3366@techsingularity.net>
Date:   Thu, 18 Nov 2021 13:27:53 +0000
From:   Mel Gorman <mgorman@...hsingularity.net>
To:     Michal Hocko <mhocko@...e.com>
Cc:     NeilBrown <neilb@...e.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Matthew Wilcox <willy@...radead.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Mel Gorman <mgorman@...e.de>
Subject: Re: [PATCH] MM: discard __GFP_ATOMIC

On Thu, Nov 18, 2021 at 10:22:36AM +0100, Michal Hocko wrote:
> [Cc Mel]
> 

I think this patch should be ok. There are few direct users of __GFP_HIGH
and some of them are borderline silly (e.g. mm/shmem.c specifying
__GFP_HIGH|__GFP_NOMEMALLOC) while others just look questionable (
drivers/md/raid10.c seems to assume __GFP_HIGH guarantees allocation
success). Xen appears to be the worst abuser of __GFP_HIGH.

-- 
Mel Gorman
SUSE Labs