linux-kernel - Re: [PATCH RESEND] mm: fix tick_sched timer blocked by pgdat_resize

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Message-Id: <20200209214530.e17798f182000b7726a621c5@linux-foundation.org>
Date:   Sun, 9 Feb 2020 21:45:30 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Shile Zhang <shile.zhang@...ux.alibaba.com>
Cc:     Kirill Tkhai <ktkhai@...tuozzo.com>,
        Pavel Tatashin <pasha.tatashin@...een.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH RESEND] mm: fix tick_sched timer blocked by
 pgdat_resize_lock

On Tue, 4 Feb 2020 15:24:38 +0800 Shile Zhang <shile.zhang@...ux.alibaba.com> wrote:

> Hi, Andrew,
> 
> Sorry for ping, could you please also help to check this issue?
> Any comments from you is welcome!
> 

Kirill's suggestion isn't pretty but it appears that it will work OK -
redo deferred_init_memmap() so it releases 1024(?) pages at a time,
releasing and retaking pgdat_resize_lock/unlock each time around?