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| From: | Paolo Bonzini |
| Subject: | Re: [Qemu-devel] [RFC]Two ideas to optimize updating irq routing table |
| Date: | Tue, 25 Mar 2014 13:37:38 +0100 |
| User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.3.0 |
Il 25/03/2014 04:19, Gonglei (Arei) ha scritto:
Based on discussions in: http://lists.gnu.org/archive/html/qemu-devel/2013-11/threads.html#03322 About KVM_SET_GSI_ROUTING ioctl, I tested changing RCU to SRCU, but unfortunately it looks like SRCU's grace period is no better than RCU.
Really? This is not what Christian Borntraeger claimed at http://permalink.gmane.org/gmane.comp.emulators.kvm.devel/118083 -- in fact, Andrew Theurer is currently testing a variant of that patch and I was going to post it for 3.16.
Have you tried synchronize_srcu_expedited? Unlike the RCU variant, you can use this function.
Paolo
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