linux-kernel - Re: [PATCH 00/24] Complete EEVDF

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

Message-ID: <yt9dttend0i6.fsf@linux.ibm.com>
Date: Tue, 10 Sep 2024 16:52:33 +0200
From: Sven Schnelle <svens@...ux.ibm.com>
To: Peter Zijlstra <peterz@...radead.org>
Cc: mingo@...hat.com, juri.lelli@...hat.com, vincent.guittot@...aro.org,
        dietmar.eggemann@....com, rostedt@...dmis.org, bsegall@...gle.com,
        mgorman@...e.de, vschneid@...hat.com, linux-kernel@...r.kernel.org,
        kprateek.nayak@....com, wuyun.abel@...edance.com,
        youssefesmat@...omium.org, tglx@...utronix.de, efault@....de
Subject: Re: [PATCH 00/24] Complete EEVDF

Peter Zijlstra <peterz@...radead.org> writes:

> On Tue, Sep 10, 2024 at 02:21:05PM +0200, Sven Schnelle wrote:
>> Sven Schnelle <svens@...ux.ibm.com> writes:
>> 
>> > Peter Zijlstra <peterz@...radead.org> writes:
>> >
>> >> Hi all,
>> >>
>> >> So after much delay this is hopefully the final version of the EEVDF patches.
>> >> They've been sitting in my git tree for ever it seems, and people have been
>> >> testing it and sending fixes.
>> >>
>> >> I've spend the last two days testing and fixing cfs-bandwidth, and as far
>> >> as I know that was the very last issue holding it back.
>> >>
>> >> These patches apply on top of queue.git sched/dl-server, which I plan on merging
>> >> in tip/sched/core once -rc1 drops.
>> >>
>> >> I'm hoping to then merge all this (+- the DVFS clock patch) right before -rc2.
>> >>
>> >>
>> >> Aside from a ton of bug fixes -- thanks all! -- new in this version is:
>> >>
>> >>  - split up the huge delay-dequeue patch
>> >>  - tested/fixed cfs-bandwidth
>> >>  - PLACE_REL_DEADLINE -- preserve the relative deadline when migrating
>> >>  - SCHED_BATCH is equivalent to RESPECT_SLICE
>> >>  - propagate min_slice up cgroups
>> >>  - CLOCK_THREAD_DVFS_ID
>> >
>> > I'm seeing crashes/warnings like the following on s390 with linux-next 20240909:
>> >
>> > Sometimes the system doesn't manage to print a oops, this one is the best i got:
>> >
>> > [..]
>> > This happens when running the strace test suite. The system normaly has
>> > 128 CPUs. With this configuration the crash doesn't happen, but when
>> > disabling all but four CPUs and running 'make check -j16' in the strace
>> > test suite the crash is almost always reproducable.
>
> I noted: Comm: prctl-sched-cor, which is testing core scheduling, right?
>
> Only today I;ve merged a fix for that:
>
>   c662e2b1e8cf ("sched: Fix sched_delayed vs sched_core")
>
> Could you double check if merging tip/sched/core into your next tree
> helps anything at all?

Yes, that fixes the issue. Thanks!