linux-rt-devel.lists.linux.dev archive mirror
 help / color / mirror / Atom feed
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: linux-kernel@vger.kernel.org, linux-rt-devel@lists.linux.dev
Cc: Thomas Gleixner <tglx@linutronix.de>, Oleg Nesterov <oleg@redhat.com>
Subject: Re: [PATCH] debugobjects: Allow to refill the pool before SYSTEM_SCHEDULING
Date: Fri, 14 Nov 2025 16:41:58 +0100	[thread overview]
Message-ID: <20251114154158.es3XCFy-@linutronix.de> (raw)
In-Reply-To: <20251106120628.AxWa_Viy@linutronix.de>

On 2025-11-06 13:06:28 [+0100], To linux-kernel@vger.kernel.org wrote:
> The pool of free objects is refilled on several occasions such as object
> initialisation. On PREEMPT_RT refilling is limited to preemptible
> sections due to sleeping locks used by the memory allocator. The system
> boots with disabled interrupts so the pool can not be refilled.
> 
> If too many objects are initialized and the pool gets empty then
> debugobjects disables itself.
> 
> Refiling can also happen early in the boot with disabled interrupts as
> long as the scheduler is not operational. If the scheduler can not
> preempt a task then a sleeping lock can not be contended.
> 
> Allow to additionally refill the pool if the scheduler is not
> operational.
> 
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

A gentle ping.

Sebastian

      reply	other threads:[~2025-11-14 15:42 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-11-06 12:06 [PATCH] debugobjects: Allow to refill the pool before SYSTEM_SCHEDULING Sebastian Andrzej Siewior
2025-11-14 15:41 ` Sebastian Andrzej Siewior [this message]

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=20251114154158.es3XCFy-@linutronix.de \
    --to=bigeasy@linutronix.de \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-rt-devel@lists.linux.dev \
    --cc=oleg@redhat.com \
    --cc=tglx@linutronix.de \
    /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;
as well as URLs for NNTP newsgroup(s).