linux-kernel - Re: [PATCH v6 0/3] mm,thp,shm: limit shmem THP alloc gfp

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Date:   Wed, 24 Feb 2021 09:46:13 -0500
From:   Rik van Riel <riel@...riel.com>
To:     Hugh Dickins <hughd@...gle.com>, Vlastimil Babka <vbabka@...e.cz>
Cc:     Andrew Morton <akpm@...ux-foundation.org>, xuyu@...ux.alibaba.com,
        mgorman@...e.de, aarcange@...hat.com, willy@...radead.org,
        linux-kernel@...r.kernel.org, kernel-team@...com,
        linux-mm@...ck.org, mhocko@...e.com
Subject: Re: [PATCH v6 0/3] mm,thp,shm: limit shmem THP alloc gfp_mask

On Wed, 2021-02-24 at 00:41 -0800, Hugh Dickins wrote:
> On Mon, 14 Dec 2020, Vlastimil Babka wrote:
> 
> > > (There's also a specific issue with the gfp_mask limiting: I have
> > > not yet reviewed the allowing and denying in detail, but it looks
> > > like it does not respect the caller's GFP_ZONEMASK - the gfp in
> > > shmem_getpage_gfp() and shmem_read_mapping_page_gfp() is there to
> > > satisfy the gma500, which wanted to use shmem but could only
> manage
> > > DMA32.  I doubt it wants THPS, but shmem_enabled=force forces
> them.)
> 
> Oh, I'd forgotten all about that gma500 aspect:
> well, I can send a fixup later on.

I already have code to fix that, which somebody earlier
in this discussion convinced me to throw away. Want me
to send it as a patch 4/3 ?

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