From: Julien Grall <julien.grall@linaro.org>
To: Oleksandr Tyshchenko <oleksandr.tyshchenko@globallogic.com>
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>,
Ian Campbell <ian.campbell@citrix.com>,
xen-devel@lists.xen.org
Subject: Re: [PATCH v1 0/2] xen/arm: maintenance_interrupt SMP fix
Date: Mon, 27 Jan 2014 17:51:56 +0000 [thread overview]
Message-ID: <52E69CBC.3090207@linaro.org> (raw)
In-Reply-To: <1390844023-23123-1-git-send-email-oleksandr.tyshchenko@globallogic.com>
On 01/27/2014 05:33 PM, Oleksandr Tyshchenko wrote:
> Hi, all.
Hello Oleksandr,
> We are trying to bringing up XEN on DRA7XX (OMAP5) platform.
>
> We sometimes see some hangs in Hypervisor and these hangs are related to SMP.
> We found out that deadlock took place in on_selected_cpus function
> in case of simultaneous occurrence cross-interrupts.
>
> The issue:
>
> 1. We receive irqs from first CPU (for example CPU0) and second CPU (for example CPU1) in parallel.
> 2. In our case the maintenance_interrupt function for maintenance irq from CPU0 is executed on CPU1 and
> maintenance_interrupt for irq from CPU1 is executed on CPU0.
> 3. According to existing logic we have run gic_irq_eoi function on CPU which it was scheduled.
gic_irq_eoi is only called for physical IRQ routed to the guest (eg:
hard drive, network, ...). As far as I remember, these IRQs are only
routed to CPU0. Do you pass-through PPIs to dom0?
--
Julien Grall
next prev parent reply other threads:[~2014-01-27 17:51 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-27 17:33 [PATCH v1 0/2] xen/arm: maintenance_interrupt SMP fix Oleksandr Tyshchenko
2014-01-27 17:33 ` [PATCH v1 1/2] xen/arm: Add return value to smp_call_function_interrupt function Oleksandr Tyshchenko
2014-01-27 18:28 ` Stefano Stabellini
2014-01-27 17:33 ` [PATCH v1 2/2] xen/arm: Fix deadlock in on_selected_cpus function Oleksandr Tyshchenko
2014-01-27 19:00 ` Stefano Stabellini
2014-01-28 10:03 ` Ian Campbell
2014-01-28 14:00 ` Stefano Stabellini
2014-01-28 15:05 ` Ian Campbell
2014-01-28 16:02 ` Stefano Stabellini
2014-01-28 16:12 ` Ian Campbell
2014-01-28 16:23 ` Stefano Stabellini
2014-01-28 13:58 ` Stefano Stabellini
2014-01-30 11:58 ` Oleksandr Tyshchenko
2014-01-27 17:40 ` [PATCH v1 0/2] xen/arm: maintenance_interrupt SMP fix Ian Campbell
2014-01-27 17:51 ` Julien Grall [this message]
2014-01-28 19:25 ` Oleksandr Tyshchenko
2014-01-29 10:56 ` Oleksandr Tyshchenko
2014-01-29 11:42 ` Stefano Stabellini
2014-01-29 11:46 ` Stefano Stabellini
2014-01-29 13:15 ` Julien Grall
2014-02-04 15:32 ` Julien Grall
2014-02-04 16:20 ` [PATCH] xen/arm: route irqs to cpu0 Stefano Stabellini
2014-02-04 16:32 ` Julien Grall
2014-02-04 16:56 ` Oleksandr Tyshchenko
2014-02-19 13:43 ` Julien Grall
2014-02-19 13:53 ` Ian Campbell
2014-02-19 14:15 ` George Dunlap
2014-02-20 14:52 ` Stefano Stabellini
2014-02-21 11:12 ` George Dunlap
2014-02-21 11:59 ` Julien Grall
2014-02-21 12:07 ` George Dunlap
2014-01-29 13:07 ` [PATCH v1 0/2] xen/arm: maintenance_interrupt SMP fix Julien Grall
2014-01-29 13:22 ` Stefano Stabellini
2014-01-29 18:40 ` Oleksandr Tyshchenko
2014-01-29 18:43 ` Oleksandr Tyshchenko
2014-01-29 18:49 ` Julien Grall
2014-01-29 19:54 ` Oleksandr Tyshchenko
2014-01-30 0:42 ` Julien Grall
2014-01-30 13:24 ` Stefano Stabellini
2014-01-30 15:06 ` Oleksandr Tyshchenko
2014-01-30 15:35 ` Stefano Stabellini
2014-01-30 16:10 ` Oleksandr Tyshchenko
2014-01-30 17:18 ` Stefano Stabellini
2014-01-30 19:54 ` Oleksandr Tyshchenko
2014-01-30 21:47 ` Julien Grall
2014-01-31 1:57 ` Oleksandr Tyshchenko
2014-01-29 13:12 ` Julien Grall
2014-01-29 18:55 ` Oleksandr Tyshchenko
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