Red Hat Bugzilla – Bug 84928
Possible deadlock under heavy load
Last modified: 2016-04-18 05:39:59 EDT
This fix has been accepted in 2.5
cut-n-paste from the checkin message:
We\'re calling mmdrop() under spin_lock_irq(&rq->lock). But mmdrop
calls vfree(), which calls smp_call_function().
It is not legal to call smp_call_function() with irq\'s off. Because
another CPU may be running smp_call_function() against _this_ CPU, which
Our read of the code is that AS 2.1 is also susceptible to this problem.
Action by: arunsharma
ISSUE TRACKER 16281 by Intel as sev 3
Is a customer really hitting this bug?
We could never locate the patch thats being referenced here. Please
provide a link to the actual patch.