From: Greg KH <gregkh@linuxfoundation.org>
To: Mahmoud Adam <mngyadam@amazon.com>
Cc: stable@vger.kernel.org
Subject: Re: backport "x86: change default to spec_store_bypass_disable=prctl spectre_v2_user=prctl"
Date: Sat, 14 Oct 2023 11:27:42 +0200 [thread overview]
Message-ID: <2023101401-boxer-grandpa-6e31@gregkh> (raw)
In-Reply-To: <lrkyqy1g6bnqi.fsf@dev-dsk-mngyadam-1c-a2602c62.eu-west-1.amazon.com>
On Fri, Oct 13, 2023 at 04:28:37PM +0200, Mahmoud Adam wrote:
>
> Hi,
>
> commit 2f46993d83ff upstream.
>
> Please backport this commit to the other stable kernels, since this
> patch landed on 6.1 and We've seen 30% improvement with docker
> containers running heavy cpu/mem tasks
Why is this required at all? It just changes a default option, you can
set the "faster" option yourself if you really feel it is a good idea
for older kernels, why can't you do that for containers you want it
enabled on for these older kernels?
And what exact kernel versions did you test this on?
And how is this not a new feature?
thanks,
greg k-h
next prev parent reply other threads:[~2023-10-14 9:27 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-13 14:28 backport "x86: change default to spec_store_bypass_disable=prctl spectre_v2_user=prctl" Mahmoud Adam
2023-10-14 9:27 ` Greg KH [this message]
2023-11-01 15:15 ` Mahmoud Adam
2023-11-06 9:19 ` Greg KH
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=2023101401-boxer-grandpa-6e31@gregkh \
--to=gregkh@linuxfoundation.org \
--cc=mngyadam@amazon.com \
--cc=stable@vger.kernel.org \
/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
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox