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From: "Naga Harish K, S V" <s.v.naga.harish.k@intel.com>
To: Jerin Jacob <jerinjacobk@gmail.com>,
	Thomas Monjalon <thomas@monjalon.net>
Cc: "jerinj@marvell.com" <jerinj@marvell.com>,
	"dev@dpdk.org" <dev@dpdk.org>,
	 "Carrillo, Erik G" <erik.g.carrillo@intel.com>,
	"pbhagavatula@marvell.com" <pbhagavatula@marvell.com>,
	"sthotton@marvell.com" <sthotton@marvell.com>,
	 "stable@dpdk.org" <stable@dpdk.org>
Subject: RE: [PATCH v7 2/3] timer: fix function to stop all timers
Date: Fri, 16 Sep 2022 04:40:06 +0000	[thread overview]
Message-ID: <DM6PR11MB386844370D6E4C131BB91D2EA1489@DM6PR11MB3868.namprd11.prod.outlook.com> (raw)
In-Reply-To: <CALBAE1MT-zBDdYdAyPhDQgyGCwMUwJb2bQ8XnqYS+4YTniW_jA@mail.gmail.com>



> -----Original Message-----
> From: Jerin Jacob <jerinjacobk@gmail.com>
> Sent: Thursday, September 15, 2022 12:12 PM
> To: Naga Harish K, S V <s.v.naga.harish.k@intel.com>; Thomas Monjalon
> <thomas@monjalon.net>
> Cc: jerinj@marvell.com; dev@dpdk.org; Carrillo, Erik G
> <erik.g.carrillo@intel.com>; pbhagavatula@marvell.com;
> sthotton@marvell.com; stable@dpdk.org
> Subject: Re: [PATCH v7 2/3] timer: fix function to stop all timers
> 
> On Wed, Sep 14, 2022 at 9:03 PM Naga Harish K S V
> <s.v.naga.harish.k@intel.com> wrote:
> >
> > There is a possibility of deadlock in this API, as same spinlock is
> > tried to be acquired in nested manner.
> >
> > If the lcore that is stopping the timer is different from the lcore
> > that owns the timer, the timer list lock is acquired in timer_del(),
> > even if local_is_locked is true. Because the same lock was already
> > acquired in rte_timer_stop_all(), the thread will hang.
> >
> > This patch removes the acquisition of nested lock.
> >
> > Fixes: 821c51267bcd63a ("timer: add function to stop all timers in a
> > list")
> > Cc: stable@dpdk.org
> >
> > Signed-off-by: Naga Harish K S V <s.v.naga.harish.k@intel.com>
Acked-by: Erik Gabriel Carrillo <erik.g.carrillo@intel.com>

Added missing ack

> > ---
> >  lib/timer/rte_timer.c | 13 ++++---------
> 
> Since this change in lib/timer. Delegating this patch to @Thomas Monjalon

  reply	other threads:[~2022-09-16  4:40 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20220812160714.287055-1-s.v.naga.harish.k@intel.com>
     [not found] ` <20220914050855.1677489-1-s.v.naga.harish.k@intel.com>
2022-09-14  5:08   ` [PATCH v5 2/4] " Naga Harish K S V
     [not found] ` <20220914051541.1678837-1-s.v.naga.harish.k@intel.com>
2022-09-14  5:15   ` Naga Harish K S V
     [not found]   ` <20220914135147.1846550-1-s.v.naga.harish.k@intel.com>
2022-09-14 13:51     ` [PATCH v6 2/3] " Naga Harish K S V
     [not found]     ` <20220914153319.1887248-1-s.v.naga.harish.k@intel.com>
2022-09-14 15:33       ` [PATCH v7 " Naga Harish K S V
2022-09-15  6:41         ` Jerin Jacob
2022-09-16  4:40           ` Naga Harish K, S V [this message]
2022-10-05 12:59             ` Thomas Monjalon
2022-09-26  5:21           ` Naga Harish K, S V

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