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From: "Kadam, Pallavi" <pallavi.kadam@intel.com>
To: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>, dev@dpdk.org
Cc: Narcisa Ana Maria Vasile <navasile@linux.microsoft.com>,
	Dmitry Malloy <dmitrym@microsoft.com>
Subject: Re: [dpdk-dev] [PATCH v2] eal/windows: fix deadlock when setting alarm
Date: Fri, 30 Oct 2020 12:25:01 -0700
Message-ID: <8f20cf1a-0302-cba6-58e7-6480a1ea638a@intel.com> (raw)
In-Reply-To: <20201030184217.19098-1-dmitry.kozliuk@gmail.com>

On 10/30/2020 11:42 AM, Dmitry Kozlyuk wrote:
> Windows alarms are both armed and executed from the interrupt thread.
> rte_eal_alarm_set() dispatched alarm-arming code to that thread and
> waited for its completion via a spinlock. However, if called from alarm
> callback (i.e. from the interrupt thread), this caused a deadlock,
> because arming could not be run until its dispatcher exits, but it could
> only exit after it finished waiting for arming to complete.
> Call arming code directly when running in the interrupt thread.
> Fixes: f4cbdbc7fbd2 ("eal/windows: implement alarm API")
> Reported-by: Pallavi Kadam <pallavi.kadam@intel.com>
> Signed-off-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
> ---

Tested-by: Pallavi Kadam <pallavi.kadam@intel.com>

Acked-by: Pallavi Kadam <pallavi.kadam@intel.com>


  reply	other threads:[~2020-10-30 19:25 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-30 18:31 [dpdk-dev] [PATCH] " Dmitry Kozlyuk
2020-10-30 18:42 ` [dpdk-dev] [PATCH v2] " Dmitry Kozlyuk
2020-10-30 19:25   ` Kadam, Pallavi [this message]
2020-11-03 20:32     ` Thomas Monjalon

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