From: "Michael S. Tsirkin" <mst@redhat.com>
To: Gleb Natapov <gleb@redhat.com>
Cc: Gregory Haskins <gregory.haskins@gmail.com>,
avi@redhat.com, "kvm@vger.kernel.org" <kvm@vger.kernel.org>,
paulmck@linux.vnet.ibm.com
Subject: Re: [PATCH 4/4] Convert irq notifiers lists to RCU locking.
Date: Mon, 13 Jul 2009 16:40:59 +0300 [thread overview]
Message-ID: <20090713134058.GG10402@redhat.com> (raw)
In-Reply-To: <20090713133234.GN28046@redhat.com>
On Mon, Jul 13, 2009 at 04:32:34PM +0300, Gleb Natapov wrote:
> Yeah I understand that other RCU read section may introduce delays too.
> The question is how big the delay may be.
I recall seeing the number "at least 3 jiffies" somewhere, but that
might have changed since.
> I don't think multiple
> milliseconds delay in device de-assignment is a big issue though.
Right. My point was that since the sync is done under kvm lock, the
guest can easily get blocked trying to get kvm lock meanwhile.
next prev parent reply other threads:[~2009-07-13 13:41 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-12 12:03 [PATCH 0/4] moving irq routing and notifiers to RCU locking Gleb Natapov
2009-07-12 12:03 ` [PATCH 1/4] Move irq routing data structure to rcu locking Gleb Natapov
2009-07-13 12:55 ` Michael S. Tsirkin
2009-07-13 13:03 ` Gleb Natapov
2009-07-13 13:15 ` Michael S. Tsirkin
2009-07-13 13:23 ` Gleb Natapov
2009-07-13 13:36 ` Michael S. Tsirkin
2009-07-13 13:01 ` Gregory Haskins
2009-07-13 13:15 ` Gleb Natapov
2009-07-13 13:16 ` Gregory Haskins
2009-07-13 13:25 ` Gleb Natapov
2009-07-13 13:29 ` Gregory Haskins
2009-07-13 15:55 ` Marcelo Tosatti
2009-07-13 16:24 ` Gleb Natapov
2009-07-13 16:27 ` Marcelo Tosatti
2009-07-13 16:33 ` Gleb Natapov
2009-07-13 16:42 ` Marcelo Tosatti
2009-07-13 16:44 ` Gleb Natapov
2009-07-13 16:45 ` Marcelo Tosatti
2009-07-13 16:54 ` Gleb Natapov
2009-07-12 12:03 ` [PATCH 2/4] Unregister ack notifier callback on PIT freeing Gleb Natapov
2009-07-12 12:03 ` [PATCH 3/4] Move irq ack notifier list to arch independent code Gleb Natapov
2009-07-12 12:03 ` [PATCH 4/4] Convert irq notifiers lists to RCU locking Gleb Natapov
2009-07-13 12:56 ` Michael S. Tsirkin
2009-07-13 13:05 ` Gleb Natapov
2009-07-13 13:29 ` Michael S. Tsirkin
2009-07-13 13:48 ` Gregory Haskins
2009-07-13 13:02 ` Michael S. Tsirkin
2009-07-13 13:11 ` Gleb Natapov
2009-07-13 13:26 ` Gregory Haskins
2009-07-13 13:32 ` Gleb Natapov
2009-07-13 13:40 ` Gregory Haskins
2009-07-13 13:52 ` Gleb Natapov
2009-07-13 14:02 ` Gregory Haskins
2009-07-13 14:08 ` Gleb Natapov
2009-07-13 13:40 ` Michael S. Tsirkin [this message]
2009-07-13 13:44 ` Gregory Haskins
2009-07-13 19:31 ` Paul E. McKenney
2009-07-14 5:46 ` Gleb Natapov
2009-07-14 12:03 ` Paul E. McKenney
2009-07-14 12:06 ` Gleb Natapov
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