From: Sergey Fedorov <serge.fdrv@gmail.com>
To: "alvise rigo" <a.rigo@virtualopensystems.com>,
"Alex Bennée" <alex.bennee@linaro.org>
Cc: "MTTCG Devel" <mttcg@listserver.greensocs.com>,
"QEMU Developers" <qemu-devel@nongnu.org>,
"Jani Kokkonen" <jani.kokkonen@huawei.com>,
"Claudio Fontana" <claudio.fontana@huawei.com>,
"VirtualOpenSystems Technical Team" <tech@virtualopensystems.com>,
"KONRAD Frédéric" <fred.konrad@greensocs.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Richard Henderson" <rth@twiddle.net>,
"Emilio G. Cota" <cota@braap.org>,
"Peter Maydell" <peter.maydell@linaro.org>
Subject: Re: [Qemu-devel] [RFC 03/10] cpus: Introduce async_wait_run_on_cpu()
Date: Wed, 8 Jun 2016 17:53:54 +0300 [thread overview]
Message-ID: <57583182.3090701@gmail.com> (raw)
In-Reply-To: <CAH47eN1G6XYB3PC0ETRDYHoLFDV-2yTEFdzAEd1kb8uZGrHs9Q@mail.gmail.com>
On 08/06/16 17:10, alvise rigo wrote:
> Using run_on_cpu() we might deadlock QEMU if other vCPUs are waiting
> for the current vCPU. We need to exit from the vCPU loop in order to
> avoid this.
I see, we could deadlock indeed. Alternatively, we may want fix
run_on_cpu() to avoid waiting for completion by itself when called from
CPU loop.
Kind regards,
Sergey
next prev parent reply other threads:[~2016-06-08 14:54 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-26 16:35 [Qemu-devel] [RFC 00/10] MTTCG: Slow-path for atomic insns Alvise Rigo
2016-05-26 16:35 ` [Qemu-devel] [RFC 01/10] exec: Introduce tcg_exclusive_{lock, unlock}() Alvise Rigo
2016-05-31 15:03 ` Pranith Kumar
2016-06-02 16:21 ` alvise rigo
2016-06-08 9:21 ` Alex Bennée
2016-06-08 10:00 ` alvise rigo
2016-06-08 11:32 ` Peter Maydell
2016-06-08 13:52 ` Alex Bennée
2016-05-26 16:35 ` [Qemu-devel] [RFC 02/10] softmmu_llsc_template.h: Move to multi-threading Alvise Rigo
2016-06-10 15:21 ` Sergey Fedorov
2016-06-10 15:53 ` alvise rigo
2016-06-10 16:00 ` Sergey Fedorov
2016-06-10 16:04 ` alvise rigo
2016-06-14 12:00 ` Alex Bennée
2016-06-14 12:58 ` alvise rigo
2016-06-14 13:14 ` Alex Bennée
2016-06-10 16:15 ` Alex Bennée
2016-06-11 19:53 ` Sergey Fedorov
2016-06-14 8:37 ` Alex Bennée
2016-06-14 9:31 ` Sergey Fedorov
2016-05-26 16:35 ` [Qemu-devel] [RFC 03/10] cpus: Introduce async_wait_run_on_cpu() Alvise Rigo
2016-06-08 13:54 ` Alex Bennée
2016-06-08 14:10 ` alvise rigo
2016-06-08 14:53 ` Sergey Fedorov [this message]
2016-06-08 15:20 ` Alex Bennée
2016-06-08 16:24 ` alvise rigo
2016-06-13 9:26 ` Alex Bennée
2016-05-26 16:35 ` [Qemu-devel] [RFC 04/10] cputlb: Introduce tlb_flush_other() Alvise Rigo
2016-05-26 16:35 ` [Qemu-devel] [RFC 05/10] target-arm: End TB after ldrex instruction Alvise Rigo
2016-05-26 16:35 ` [Qemu-devel] [RFC 06/10] cputlb: Add tlb_tables_flush_bitmap() Alvise Rigo
2016-05-26 16:35 ` [Qemu-devel] [RFC 07/10] cputlb: Query tlb_flush_by_mmuidx Alvise Rigo
2016-05-26 16:35 ` [Qemu-devel] [RFC 08/10] cputlb: Query tlb_flush_page_by_mmuidx Alvise Rigo
2016-05-26 16:35 ` [Qemu-devel] [RFC 09/10] cputlb: Query tlb_flush_page_all Alvise Rigo
2016-05-26 16:35 ` [Qemu-devel] [RFC 10/10] cpus: Do not sleep if some work item is pending Alvise Rigo
2016-06-10 15:21 ` [Qemu-devel] [RFC 00/10] MTTCG: Slow-path for atomic insns Alex Bennée
2016-06-10 15:30 ` alvise rigo
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