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From: | Paolo Bonzini |
Subject: | Re: [Qemu-devel] [RFC] create a single workqueue for each vm to update vm irq routing table |
Date: | Thu, 28 Nov 2013 12:10:40 +0100 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130923 Thunderbird/17.0.9 |
Il 28/11/2013 12:09, Gleb Natapov ha scritto: > > - if there are no callbacks, but there are readers, synchronize_srcu > > busy-loops for some time checking if the readers complete. After a > > while (20 us for synchronize_srcu, 120 us for > > synchronize_srcu_expedited) it gives up and starts using a workqueue to > > poll every millisecond. This should never happen unless > > Unless what ? :) Unless reader is scheduled out? Yes. Or unless my brain is scheduled out in the middle of a sentence. Paolo
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