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Date:   Sat, 14 Oct 2023 11:27:42 +0200
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"
Message-ID: <2023101401-boxer-grandpa-6e31@gregkh>
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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