From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Peter Zijlstra <peterz@infradead.org>
Cc: linux-kernel@vger.kernel.org,
"André Almeida" <andrealmeid@igalia.com>,
"Darren Hart" <dvhart@infradead.org>,
"Davidlohr Bueso" <dave@stgolabs.net>,
"Ingo Molnar" <mingo@redhat.com>,
"Juri Lelli" <juri.lelli@redhat.com>,
"Valentin Schneider" <vschneid@redhat.com>,
"Waiman Long" <longman@redhat.com>
Subject: Re: [RFC PATCH 2/3] futex: Add basic infrastructure for local task local hash.
Date: Mon, 28 Oct 2024 11:24:08 +0100 [thread overview]
Message-ID: <20241028102408.GbFgnLMF@linutronix.de> (raw)
In-Reply-To: <20241028101633.GM9767@noisy.programming.kicks-ass.net>
On 2024-10-28 11:16:33 [+0100], Peter Zijlstra wrote:
> On Sun, Oct 27, 2024 at 12:34:51AM +0200, Sebastian Andrzej Siewior wrote:
>
> > Introduce a task local hash map. The hashmap can be allocated via
> > prctl(PR_FUTEX_HASH, PR_FUTEX_HASH_ALLOCATE, 0)
>
> Per process, per task is useless and will make things malfunction.
>
> Things missing in this patch are CLONE_THREAD / CLONE_VM, and create
> must be absolutely forbidden once mm_users != 1.
I moved this to struct signal_struct and limited it for now to the
group leader.
Sebastian
next prev parent reply other threads:[~2024-10-28 10:24 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-26 22:34 [RFC PATCH 0/3] futex: Add support task local hash maps Sebastian Andrzej Siewior
2024-10-26 22:34 ` [RFC PATCH 1/3] futex: Create helper function to initialize a hash slot Sebastian Andrzej Siewior
2024-10-26 22:34 ` [RFC PATCH 2/3] futex: Add basic infrastructure for local task local hash Sebastian Andrzej Siewior
2024-10-27 12:19 ` Thomas Gleixner
2024-10-28 10:30 ` Sebastian Andrzej Siewior
2024-10-28 10:58 ` Thomas Gleixner
2024-10-28 11:00 ` Peter Zijlstra
2024-10-28 12:02 ` Thomas Gleixner
2024-10-30 21:08 ` Peter Zijlstra
2024-10-30 23:14 ` Thomas Gleixner
2024-10-31 9:13 ` Peter Zijlstra
2024-10-28 10:16 ` Peter Zijlstra
2024-10-28 10:24 ` Sebastian Andrzej Siewior [this message]
2024-10-28 10:46 ` Peter Zijlstra
2024-10-28 13:10 ` Peter Zijlstra
2024-10-26 22:34 ` [RFC PATCH 3/3] futex: Use the task local hashmap Sebastian Andrzej Siewior
2024-10-28 10:22 ` Peter Zijlstra
2024-10-28 10:24 ` Sebastian Andrzej Siewior
2024-10-27 10:01 ` [RFC PATCH 0/3] futex: Add support task local hash maps Thomas Gleixner
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=20241028102408.GbFgnLMF@linutronix.de \
--to=bigeasy@linutronix.de \
--cc=andrealmeid@igalia.com \
--cc=dave@stgolabs.net \
--cc=dvhart@infradead.org \
--cc=juri.lelli@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=longman@redhat.com \
--cc=mingo@redhat.com \
--cc=peterz@infradead.org \
--cc=vschneid@redhat.com \
/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