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  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]
Date:   Tue, 10 Aug 2021 15:14:28 -0400
From:   Steven Rostedt <>
To:     Sebastian Andrzej Siewior <>
Cc:     Clark Williams <>,
        Thomas Gleixner <>,
        Dmitry Vyukov <>,
        Andrey Konovalov <>,,
Subject: Re: [PATCH PREEMPT_RT] kcov:  fix locking splat from

On Tue, 10 Aug 2021 11:50:32 +0200
Sebastian Andrzej Siewior <> wrote:

> - With lock kcov_remote_lock acquired there is a possible
>   hash_for_each_safe() and list_for_each() iteration. I don't know what
>   the limits are here but with a raw_spinlock_t it will contribute to
>   the maximal latency. 

Note, anyone having a kernel with KCOV compiled in, probably doesn't
care about latency ;-) It's like worrying about latency when lockdep is
complied in.

-- Steve

Powered by blists - more mailing lists