linux-kernel - Re: [PATCH] clocksource/drivers/riscv: Events are stopped during CPU suspend

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] [day] [month] [year] [list]

Message-ID: <6354C70F-86C7-430D-AF0A-3483B772B02C@kernel.org>
Date:   Fri, 28 Oct 2022 01:30:34 +0100
From:   Conor Dooley <conor@...nel.org>
To:     Samuel Holland <samuel@...lland.org>,
        Palmer Dabbelt <palmer@...belt.com>, apatel@...tanamicro.com
CC:     daniel.lezcano@...aro.org, tglx@...utronix.de,
        aou@...s.berkeley.edu, atishp@...shpatra.org, dmitriy@...-tech.org,
        Paul Walmsley <paul.walmsley@...ive.com>,
        linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org
Subject: Re: [PATCH] clocksource/drivers/riscv: Events are stopped during CPU suspend



On 28 October 2022 00:41:45 IST, Samuel Holland <samuel@...lland.org> wrote:
>
>I still don't see why you consider this patch to have broken anything.
>Can anyone explain why getting an RCU stall is better than not getting one?

Taking that to the extreme, why even have RCU stall detection at all? It's not a case of with the patch the system works fine and without it there are stalls. With the patch, the system completely locks up during boot and never makes progress. I think I've done a bad job of getting across that the system just dies during boot.

(Apologies for formatting, mobile...)