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  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:	Wed, 24 Jun 2015 20:36:38 -0700
From:	Dave Hansen <>
To:	unlisted-recipients:; (no To-header on input)
Subject: Re: [RFC][PATCH] sched: might_sleep(): do rate-limiting before sanity

On 06/24/2015 05:03 PM, Dave Hansen wrote:
> In any case, we ratelimit might_sleep() checks anyway.  But, we
> do the ratelimiting *after* we check the other conditions for
> might_sleep() including the (costly) irqs_disabled() call.

Thinking about this a bit more, this patch is wrong.

This only does a _check_ once per jiffy instead of just one warning per
jiffy, which is totally bogus.

I would be interested, though, if anybody has any ideas about speeding
up the irqs_disabled() checking.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

Powered by blists - more mailing lists