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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.