Messages in this thread | | | Date | Fri, 20 Jan 2012 08:49:57 -0600 (CST) | From | Christoph Lameter <> | Subject | Re: Hung task when calling clone() due to netfilter/slab |
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On Thu, 19 Jan 2012, Eric W. Biederman wrote:
> On the flip side removing from sysfs with locks held must be done > carefully, and as a default I would recommend not to hold locks over > removing things from sysfs. As removal blocks waiting for all of the > callers into sysfs those sysfs attributes to complete. > > It looks like you are ok on the removal because none of the sysfs > attributes appear to take the slub_lock, just /proc/slabinfo. But > it does look like playing with fire.
Ok then I guess my last patch is needed to make sysfs operations safe.
It may be good to audit the kernel for locks being held while calling sysfs functions. Isnt there a lockdep check that ensures that no locks are held?
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