linux-kernel - Re: [PATCH RFC 0/4] Per-task PTI activation

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Message-ID: <6aa212d8-df18-a12c-343f-087c6973e9d1@intel.com>
Date:   Mon, 8 Jan 2018 09:17:40 -0800
From:   Dave Hansen <dave.hansen@...el.com>
To:     Willy Tarreau <w@....eu>
Cc:     linux-kernel@...r.kernel.org, x86@...nel.org, tglx@...utronix.de,
        gnomes@...rguk.ukuu.org.uk, torvalds@...ux-foundation.org,
        Andy Lutomirski <luto@...nel.org>
Subject: Re: [PATCH RFC 0/4] Per-task PTI activation

On 01/08/2018 09:06 AM, Willy Tarreau wrote:
> On Mon, Jan 08, 2018 at 08:59:54AM -0800, Dave Hansen wrote:
>> On 01/08/2018 08:12 AM, Willy Tarreau wrote:
>>> I could experiment a bit with the possibility to enable/disable PTI per
>>> task. Please keep in mind that it's not my area of experitise at all, but
>>> doing so I could recover the initial performance without disabling PTI on
>>> the whole system.
>> This cc list is way too small.  Please at *least* include me and Andy on
>> this kind of stuff.
> You're welcome Dave. In fact you were the two I initially copied from
> another thread and seeing the huge amount of CCs I preferred to stick
> to recent discussions and cc x86 thinking all people involved were there.

x86@ is only the maintainers.  It isn't a general mailing list.

> Feel free to suggest a wider list. Maybe all the CCs of the latest PTI
> patch ?

get_maintainer.pl is your friend.  For patch 4/4 it gives this:

> Thomas Gleixner <tglx@...utronix.de> (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT),commit_signer:6/8=75%,authored:1/8=12%)
> Ingo Molnar <mingo@...hat.com> (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT),commit_signer:7/8=88%)
> "H. Peter Anvin" <hpa@...or.com> (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT))
> x86@...nel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT))
> Borislav Petkov <bp@...e.de> (commit_signer:2/8=25%)
> Andy Lutomirski <luto@...nel.org> (commit_signer:2/8=25%,authored:2/8=25%,added_lines:21/187=11%,removed_lines:52/67=78%)
> Peter Zijlstra <peterz@...radead.org> (commit_signer:2/8=25%,authored:2/8=25%,added_lines:87/187=47%,removed_lines:15/67=22%)
> Dave Hansen <dave.hansen@...ux.intel.com> (authored:1/8=12%,added_lines:66/187=35%)
> Josh Poimboeuf <jpoimboe@...hat.com> (authored:1/8=12%)
> linux-kernel@...r.kernel.org (open list:X86 ARCHITECTURE (32-BIT AND 64-BIT))

Which is shockingly close to what Ingo suggested.