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 for Android: free password hash cracker in your pocket
[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Date:	Mon, 16 Sep 2013 08:02:10 +0200
From:	Peter Zijlstra <>
To:	Christoph Lameter <>
Cc:	Frederic Weisbecker <>,
	Andrew Morton <>,
	Gilad Ben-Yossef <>,
	Thomas Gleixner <>,
	Mike Frysinger <>,,
	"Paul E. McKenney" <>,
	Ingo Molnar <>
Subject: Re: [RFC] Restrict kernel spawning of threads to a specified set of

On Fri, Sep 13, 2013 at 03:40:40PM +0000, Christoph Lameter wrote:
> Hmmm... usermodehelper is based on workqueues. I guess this will
> ultimately come down to modify the workqueue behavior for

You don't need to keep it like that -- in fact I would suggest removing
that dependency and creating an extra (explicit) unbound thread spawner
that both usermodehelper and kworker can use for unbound threads.

> If WORK_CPU_UNBOUND could mean to limit process execution to the affinity
> of kthreadd then we are fine.

No, kthreadd must stay clean, if must not have any affinity nor be part
of any cgroup like thing. We must have means of spawning clean kthreads,
therefore we need to create a new parent for these special cases.

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