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:	Thu, 23 Oct 2014 15:37:59 -0400
From:	Dave Jones <>
To:	"Paul E. McKenney" <>
Cc:	Linux Kernel <>,,
Subject: Re: rcu_preempt detected stalls.

On Thu, Oct 23, 2014 at 12:28:07PM -0700, Paul E. McKenney wrote:
 > >  > This one will require more looking.  But did you do something like
 > >  > create a pair of mutually recursive symlinks or something?  ;-)
 > > 
 > > I'm not 100% sure, but this may have been on a box that I was running
 > > tests on NFS. So maybe the server had disappeared with the mount
 > > still active..
 > > 
 > > Just a guess tbh.
 > Another possibility might be that the box was so overloaded that tasks
 > were getting preempted for 21 seconds as a matter of course, and sometimes
 > within RCU read-side critical sections.  Or did the box have ample idle
 > time?

I fairly recently upped the number of child processes I typically run
with, so it being overloaded does sound highly likely.

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