LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Rafael Aquini <aquini@redhat.com>
To: Andrea Arcangeli <aarcange@redhat.com>
Cc: Will Deacon <will@kernel.org>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Mark Salter <msalter@redhat.com>,
	Jon Masters <jcm@jonmasters.org>,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	linux-arm-kernel@lists.infradead.org,
	Michal Hocko <mhocko@kernel.org>, QI Fuli <qi.fuli@fujitsu.com>
Subject: Re: [PATCH 2/3] arm64: select CPUMASK_OFFSTACK if NUMA
Date: Mon, 2 Mar 2020 23:31:13 -0500	[thread overview]
Message-ID: <20200303043113.GB94763@t490s> (raw)
In-Reply-To: <20200223192520.20808-3-aarcange@redhat.com>

On Sun, Feb 23, 2020 at 02:25:19PM -0500, Andrea Arcangeli wrote:
> It's unclear why normally CPUMASK_OFFSTACK can only be manually
> configured "if DEBUG_PER_CPU_MAPS" which is not an option meant to be
> enabled on enterprise arm64 kernels.
> 
> The default enterprise kernels NR_CPUS is 4096 which is fairly large.
> So it'll save some RAM and it'll increase reliability to select
> CPUMASK_OFFSET at least when NUMA is selected and a large NR_CPUS is
> to be expected.
> 
> Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
> ---
>  arch/arm64/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index 0b30e884e088..882887e65394 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -955,6 +955,7 @@ config NUMA
>  	bool "Numa Memory Allocation and Scheduler Support"
>  	select ACPI_NUMA if ACPI
>  	select OF_NUMA
> +	select CPUMASK_OFFSTACK
>  	help
>  	  Enable NUMA (Non Uniform Memory Access) support.
> 

Acked-by: Rafael Aquini <aquini@redhat.com>


  reply	other threads:[~2020-03-03  4:31 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-23 19:25 [PATCH 0/3] arm64: tlb: skip tlbi broadcast v2 Andrea Arcangeli
2020-02-23 19:25 ` [PATCH 1/3] mm: use_mm: fix for arches checking mm_users to optimize TLB flushes Andrea Arcangeli
2020-03-03  4:28   ` Rafael Aquini
2020-02-23 19:25 ` [PATCH 2/3] arm64: select CPUMASK_OFFSTACK if NUMA Andrea Arcangeli
2020-03-03  4:31   ` Rafael Aquini [this message]
2020-02-23 19:25 ` [PATCH 3/3] arm64: tlb: skip tlbi broadcast Andrea Arcangeli
2020-03-02 15:24   ` Rafael Aquini
2020-03-04  4:19     ` Rafael Aquini
2020-03-09 11:22   ` Catalin Marinas
2020-03-14  3:16     ` Andrea Arcangeli
2020-03-16 14:09       ` Mark Rutland
2020-03-31  9:45         ` Mark Rutland
2020-04-01  0:32           ` Andrea Arcangeli
2020-03-18  8:53 ` [PATCH 0/3] arm64: tlb: skip tlbi broadcast v2 qi.fuli

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200303043113.GB94763@t490s \
    --to=aquini@redhat.com \
    --cc=aarcange@redhat.com \
    --cc=catalin.marinas@arm.com \
    --cc=jcm@jonmasters.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=mhocko@kernel.org \
    --cc=msalter@redhat.com \
    --cc=qi.fuli@fujitsu.com \
    --cc=will@kernel.org \
    --subject='Re: [PATCH 2/3] arm64: select CPUMASK_OFFSTACK if NUMA' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).