From: Martin Doucha <mdoucha@suse.cz>
To: Petr Vorel <pvorel@suse.cz>
Cc: Nicolai Stange <nstange@suse.de>, ltp@lists.linux.it
Subject: Re: [LTP] [PATCH v2 4/7] KVM: Add async communication helper functions
Date: Mon, 29 May 2023 10:20:20 +0200 [thread overview]
Message-ID: <0023ff26-0798-6f37-4bb8-e733bfed1fcb@suse.cz> (raw)
In-Reply-To: <20230529055110.GC6579@pevik>
On 29. 05. 23 7:51, Petr Vorel wrote:
> Hi Martin,
>
>> Test programs using these functions must have at least two host threads.
> IMHO we don't have flags to require this. I guess KVM hosts nowadays should have
> more than 2 threads (these tests are for bare metal), thus we don't have to note
> this also in the code, right?
We have tst_test.min_cpus, used e.g. in kvm_svm03. But this is a note to
programmers that they must use pthreads, otherwise tst_kvm_wait_guest()
will always time out or lock up. The signaling can work even on single
CPU unless you somehow manage to break task switching in the host kernel
(like in kvm_svm03).
--
Martin Doucha mdoucha@suse.cz
QA Engineer for Software Maintenance
SUSE LINUX, s.r.o.
CORSO IIa
Krizikova 148/34
186 00 Prague 8
Czech Republic
--
Mailing list info: https://lists.linux.it/listinfo/ltp
next prev parent reply other threads:[~2023-05-29 8:20 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-26 13:34 [LTP] [PATCH v2 0/7] Two AMD SVM vulnerability tests Martin Doucha
2023-05-26 13:34 ` [LTP] [PATCH v2 1/7] KVM: Add VMSAVE/VMLOAD intercept constants Martin Doucha
2023-05-26 13:34 ` [LTP] [PATCH v2 2/7] Add test for CVE 2021-3656 Martin Doucha
2023-05-26 14:07 ` Petr Vorel
2023-05-26 14:10 ` Petr Vorel
2023-05-26 14:14 ` Petr Vorel
2023-05-26 14:27 ` Petr Vorel
2023-05-26 13:34 ` [LTP] [PATCH v2 3/7] lib: Add safe functions for pthread_kill() and mutexes Martin Doucha
2023-05-26 13:34 ` [LTP] [PATCH v2 4/7] KVM: Add async communication helper functions Martin Doucha
2023-05-29 5:51 ` Petr Vorel
2023-05-29 8:20 ` Martin Doucha [this message]
2023-05-29 8:27 ` Petr Vorel
2023-05-26 13:34 ` [LTP] [PATCH v2 5/7] KVM: Allow expected KVM_RUN errors in tst_kvm_run_instance() Martin Doucha
2023-05-26 13:34 ` [LTP] [PATCH v2 6/7] KVM: Add STGI/CLGI intercept constants Martin Doucha
2023-05-29 5:24 ` Petr Vorel
2023-05-26 13:34 ` [LTP] [PATCH v2 7/7] Add KVM test for CPU lockup through malicous SVM guest Martin Doucha
2023-05-29 10:02 ` [LTP] [PATCH v2 0/7] Two AMD SVM vulnerability tests Cyril Hrubis
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