All of
 help / color / mirror / Atom feed
From: Peter Zijlstra <>
	Will Deacon <>
Subject: [PATCH v3 0/6] Freezer rewrite
Date: Sat, 09 Oct 2021 12:07:54 +0200	[thread overview]
Message-ID: <> (raw)

Hi all,

This is the by now familiar rewrite of the freezer, but with yet another
attempt at getting the special blocked states (STOPPED/TRACED) right.

Currently it is already possible to tell if a task should be STOPPED from
looking at p->jobctl, the same idea is extended to TRACED and p->ptrace.

But treating p->jobctl/p->ptrace as canonical state, the blocked state can be
(hopefully correctly this time) reconstructed from it at all times.
Specifically, if a TRACED task was woken by the tracer, while the tracee was
FROZEN, the p->ptrace state will have been updated, and the thaw operation will
result in the wakeup.

Oleg, if you can please try and shoot holes in it again? :-)

             reply	other threads:[~2021-10-09 10:20 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-09 10:07 Peter Zijlstra [this message]
2021-10-09 10:07 ` [PATCH v3 1/6] freezer: Have {,un}lock_system_sleep() save/restore flags Peter Zijlstra
2021-10-14  8:58   ` Will Deacon
2021-10-09 10:07 ` [PATCH v3 2/6] freezer,umh: Clean up freezer/initrd interaction Peter Zijlstra
2021-10-14  9:13   ` Will Deacon
2021-10-09 10:07 ` [PATCH v3 3/6] ptrace: Order and comment PT_flags Peter Zijlstra
2021-10-14  9:31   ` Will Deacon
2021-10-14 14:27     ` Peter Zijlstra
2021-10-09 10:07 ` [PATCH v3 4/6] ptrace: Track __TASK_TRACED state in p->ptrace Peter Zijlstra
2021-10-09 10:07 ` [PATCH v3 5/6] sched,ptrace: Avoid relying on __TASK_TRACED | __TASK_STOPPED Peter Zijlstra
2021-10-09 10:08 ` [PATCH v3 6/6] freezer,sched: Rewrite core freezer logic Peter Zijlstra
2021-10-18 13:36   ` Peter Zijlstra

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:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \ \ \ \ \ \ \ \ \ \ \ \ \ \
    --subject='Re: [PATCH v3 0/6] Freezer rewrite' \

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

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.