linux-kernel - [PATCH v3 0/1] wait_task_inactive() spend too much time on system startup

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20200306070133.18335-1-cl@rock-chips.com>
Date:   Fri,  6 Mar 2020 15:01:32 +0800
From:   <cl@...k-chips.com>
To:     heiko@...ech.de
Cc:     mingo@...hat.com, peterz@...radead.org, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, dietmar.eggemann@....com,
        rostedt@...dmis.org, bsegall@...gle.com, mgorman@...e.de,
        akpm@...ux-foundation.org, tglx@...utronix.de, mpe@...erman.id.au,
        surenb@...gle.com, ben.dooks@...ethink.co.uk,
        anshuman.khandual@....com, catalin.marinas@....com,
        will@...nel.org, keescook@...omium.org, luto@...capital.net,
        wad@...omium.org, mark.rutland@....com, geert+renesas@...der.be,
        george_davis@...tor.com, sudeep.holla@....com,
        linux@...linux.org.uk, gregkh@...uxfoundation.org, info@...ux.net,
        kstewart@...uxfoundation.org, allison@...utok.net,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        huangtao@...k-chips.com, Liang Chen <cl@...k-chips.com>
Subject: [PATCH v3 0/1] wait_task_inactive() spend too much time on system startup

From: Liang Chen <cl@...k-chips.com>

Changelog:
v1: wait_task_inactive() frequently call schedule_hrtimeout() and spend a lot of time,
i am trying to optimize it on rockchip platform.
v2: Use atomic_flags(PFA) instead of TIF flag, and add some comments.
v3: Use a new method fix this issue to make the code simple.

Liang Chen (1):
  kthread: do not preempt current task if it is going to call schedule()

 kernel/kthread.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

-- 
2.17.1