On 04/19/17 05:37, Sepherosa Ziehau wrote:
On Wed, Apr 19, 2017 at 10:39 AM, Somayajulu, David
<david.somayaj...@cavium.com> wrote:
Sorry what I meant to ask was, whether it is O.K to call taskqueue_drain(),
when an MTX_DEF lock is grabbed prior to calling taskqueue_drain().
You will hit WITNESS, if the drain needs to wait; that's probably the
best case. If the lock will be acquired in the task being drained,
this leads to deadlock.
Hi,
No sleeping functions like taskqueue_drain() can be called when the
MTX_DEF lock is grabbed.
--HPS
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