From: Paolo Bonzini <pbonzini@redhat.com>
To: Marcelo Tosatti <mtosatti@redhat.com>
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [patch 1/2] qemu: mempath: prefault pages manually
Date: Wed, 09 Oct 2013 23:26:58 +0200 [thread overview]
Message-ID: <5255CA22.30107@redhat.com> (raw)
In-Reply-To: <20131009194109.GA16670@amt.cnet>
Il 09/10/2013 21:41, Marcelo Tosatti ha scritto:
>> > How was that tested? For BUS_MCEERR_AO it can work, but BUS_MCEERR_AR
>> > calls force_sig_info which does this:
>> >
>> > ignored = action->sa.sa_handler == SIG_IGN;
>> > blocked = sigismember(&t->blocked, sig);
>> > if (blocked || ignored) {
>> > action->sa.sa_handler = SIG_DFL;
>> > if (blocked) {
>> > sigdelset(&t->blocked, sig);
>> > recalc_sigpending_and_wake(t);
>> > }
>> >
>> > if (action->sa.sa_handler == SIG_DFL)
>> > t->signal->flags &= ~SIGNAL_UNKILLABLE;
>> >
>> > and kills the process (because that's the default action of SIG_DFL).
> For vcpu context its not blocked?
It causes KVM to exit back to userspace, but as soon as KVM exits it
should be blocked. Thus a SIGBUS with BUS_MCEERR_AR will never be
returned by sigtimedwait.
Paolo
next prev parent reply other threads:[~2013-10-09 21:27 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-08 0:41 [Qemu-devel] [patch 0/2] force -mem-path RAM allocation Marcelo Tosatti
2013-10-08 0:41 ` [Qemu-devel] [patch 1/2] qemu: mempath: prefault pages manually Marcelo Tosatti
2013-10-08 8:03 ` Paolo Bonzini
2013-10-08 21:51 ` Marcelo Tosatti
2013-10-09 8:05 ` Paolo Bonzini
2013-10-09 19:41 ` Marcelo Tosatti
2013-10-09 21:26 ` Paolo Bonzini [this message]
2013-10-10 2:11 ` Marcelo Tosatti
2013-10-10 6:30 ` Paolo Bonzini
2013-10-28 13:48 ` Paolo Bonzini
2013-10-28 19:21 ` [Qemu-devel] qemu: mempath: prefault pages manually (v3) Marcelo Tosatti
2013-10-28 20:51 ` [Qemu-devel] qemu: mempath: prefault pages manually (v4) Marcelo Tosatti
2013-10-28 16:15 ` [Qemu-devel] [patch 1/2] qemu: mempath: prefault pages manually Peter Maydell
2013-10-08 0:41 ` [Qemu-devel] [patch 2/2] qemu: add -mem-path-force option to force RAM allocation via -mem-path Marcelo Tosatti
2013-10-08 7:32 ` [Qemu-devel] [patch 0/2] force -mem-path RAM allocation Markus Armbruster
2013-10-08 8:02 ` Paolo Bonzini
2013-10-08 22:03 ` Marcelo Tosatti
2013-10-09 6:23 ` Markus Armbruster
2013-10-09 20:05 ` Marcelo Tosatti
2013-10-09 21:27 ` Paolo Bonzini
2013-10-10 15:17 ` Marcelo Tosatti
2013-10-09 7:43 ` Paolo Bonzini
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