linux-kernel - Re: [PATCH 1/1] Fix undefined reference to 'node_reclaim

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAMuHMdVtm6BGx6d+F8-Bw+fD-M-DugspLkBvCtTKGgWiPvJnSA@mail.gmail.com>
Date:   Mon, 16 Dec 2019 14:31:15 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Gonsolo <gonsolo@...il.com>
Cc:     Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Nicholas Piggin <npiggin@...il.com>,
        Linux-sh list <linux-sh@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Matt Fleming <matt@...eblueprint.co.uk>,
        Randy Dunlap <rdunlap@...radead.org>
Subject: Re: [PATCH 1/1] Fix undefined reference to 'node_reclaim_distance'.

Hi Gon,

On Mon, Dec 16, 2019 at 2:21 PM Gonsolo <gonsolo@...il.com> wrote:
> > Unfortunately that may be an x86-centric assumption: on other platforms,
> > there do exist systems with multiple memory banks with different access
> > performance figures.
>
> Does that mean that the line
>
> obj-$(CONFIG_SMP) += cpupri.o cpudeadline.o topology.o stop_task.o pelt.o
>
> in kernel/sched/topology/Makefile:23 is wrong?
>
> Because in topology.c:1284 the variable node_reclaim_distance ist defined
> which is used in mm/page_alloc.c:3529 without depending on SMP.

The offending commit seems to be a55c7454a8c887b2 ("sched/topology:
Improve load balancing on AMD EPYC systems").

Probably the node_reclaim_distance variable should be moved from
an SMP-specific file to a NUMA-specific file.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds