linux-kernel - Re: [PATCH] mm: fix panic in __alloc

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Message-ID: <YYFHPGq/E9F11F7o@dhcp22.suse.cz>
Date:   Tue, 2 Nov 2021 15:12:12 +0100
From:   Michal Hocko <mhocko@...e.com>
To:     David Hildenbrand <david@...hat.com>
Cc:     Alexey Makhalov <amakhalov@...are.com>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        Oscar Salvador <OSalvador@...e.com>
Subject: Re: [PATCH] mm: fix panic in __alloc_pages

On Tue 02-11-21 14:41:25, David Hildenbrand wrote:
> On 02.11.21 14:25, Michal Hocko wrote:
[...]
> > Btw. do you plan to send a patch for pcp allocator to use cpu_to_mem?
> 
> You mean s/cpu_to_node/cpu_to_mem/ or also handling offline nids?

just cpu_to_mem

> cpu_to_mem() corresponds to cpu_to_node() unless on ia64+ppc IIUC, so it
> won't help for this very report.

Weird, x86 allows memory less nodes as well. But you are right
there is nothing selecting HAVE_MEMORYLESS_NODES neither do I see any
arch specific implementation. I have to say that I have forgot all those
nasty details... Sigh
-- 
Michal Hocko
SUSE Labs