linux-kernel - Re: [PATCH V3 1/2] zpool: Add malloc_support_movable to zpool

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Date:   Wed, 5 Jun 2019 09:31:37 -0700
From:   Shakeel Butt <shakeelb@...gle.com>
To:     Hui Zhu <teawaterz@...ux.alibaba.com>,
        Vitaly Wool <vitalywool@...il.com>
Cc:     Dan Streetman <ddstreet@...e.org>,
        Minchan Kim <minchan@...nel.org>, ngupta@...are.org,
        sergey.senozhatsky.work@...il.com,
        Seth Jennings <sjenning@...hat.com>,
        Linux MM <linux-mm@...ck.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V3 1/2] zpool: Add malloc_support_movable to zpool_driver

On Wed, Jun 5, 2019 at 3:06 AM Hui Zhu <teawaterz@...ux.alibaba.com> wrote:
>
> As a zpool_driver, zsmalloc can allocate movable memory because it
> support migate pages.
> But zbud and z3fold cannot allocate movable memory.
>

Cc: Vitaly

It seems like z3fold does support page migration but z3fold's malloc
is rejecting __GFP_HIGHMEM. Vitaly, is there a reason to keep
rejecting __GFP_HIGHMEM after 1f862989b04a ("mm/z3fold.c: support page
migration").

thanks,
Shakeel