From: Christian Borntraeger <borntraeger@de.ibm.com>
To: Avi Kivity <avi@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>,
kvm@vger.kernel.org, Heiko Carstens <heiko.carstens@de.ibm.com>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Carsten Otte <cotte@de.ibm.com>
Subject: Re: kvm-s390: Dont exit SIE on SIGP sense running
Date: Mon, 21 Jun 2010 12:15:33 +0200 [thread overview]
Message-ID: <201006211215.33599.borntraeger@de.ibm.com> (raw)
In-Reply-To: <4C1F2286.7090108@redhat.com>
Am Montag 21 Juni 2010, 10:27:50 schrieb Avi Kivity:
[...]
> > VCPU_EVENT(vcpu, 3, "%s", "free cpu");
> > + clear_bit(63 - vcpu->vcpu_id, (unsigned long *)&vcpu->kvm->arch.sca->mcn);
> > if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda ==
> > (__u64) vcpu->arch.sie_block)
> > vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0;
> >
>
> Unrelated, do these VCPU_EVENTs want to become ftrace tracepoints?
>
>
Hmm, dont know. Currently this calls into a s390 debug tracing facility
(arch/s390/kernel/debug.c) which is heavily used by our service folks.
There are commands for crash and lcrash to show these s390 debug traces
from a dump.
Maybe its worth to investigate if we should change some of these events to
have both ftrace-tracepoints and the debug traces.
Christian
next prev parent reply other threads:[~2010-06-21 10:15 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-17 21:16 kvm-s390: Dont exit SIE on SIGP sense running Christian Borntraeger
2010-06-21 8:27 ` Avi Kivity
2010-06-21 10:15 ` Christian Borntraeger [this message]
2010-06-21 10:26 ` Arnd Bergmann
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