From: Daniel Thompson <daniel.thompson@linaro.org>
To: Liuye <liu.yeC@h3c.com>
Cc: "jason.wessel@windriver.com" <jason.wessel@windriver.com>,
"dianders@chromium.org" <dianders@chromium.org>,
"gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
"jirislaby@kernel.org" <jirislaby@kernel.org>,
"kgdb-bugreport@lists.sourceforge.net"
<kgdb-bugreport@lists.sourceforge.net>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-serial@vger.kernel.org" <linux-serial@vger.kernel.org>
Subject: Re: 答复: 答复: 答复: [PATCH] kdb: Fix the deadlock issue in KDB debugging.
Date: Tue, 12 Mar 2024 10:24:19 +0000 [thread overview]
Message-ID: <20240312102419.GC202685@aspen.lan> (raw)
In-Reply-To: <06cfa3459ed848cf8f228997b983cf53@h3c.com>
On Tue, Mar 12, 2024 at 10:04:54AM +0000, Liuye wrote:
> >On Tue, Mar 12, 2024 at 08:37:11AM +0000, Liuye wrote:
> >> I know that you said schedule_work is not NMI save, which is the first
> >> issue. Perhaps it can be fixed using irq_work_queue. But even if
> >> irq_work_queue is used to implement it, there will still be a deadlock
> >> problem because slave cpu1 still has not released the running queue
> >> lock of master CPU0.
> >
> >This doesn't sound right to me. Why do you think CPU1 won't release
> >the run queue lock?
>
> In this example, CPU1 is waiting for CPU0 to release dbg_slave_lock.
That shouldn't be a problem. CPU0 will have released that lock by
the time the irq work is dispatched.
Daniel.
next prev parent reply other threads:[~2024-03-12 10:24 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-28 2:56 [PATCH] kdb: Fix the deadlock issue in KDB debugging LiuYe
2024-02-28 12:05 ` Daniel Thompson
2024-03-01 3:30 ` 答复: " Liuye
2024-03-01 10:59 ` Daniel Thompson
2024-03-12 8:37 ` 答复: " Liuye
2024-03-12 9:57 ` Daniel Thompson
2024-03-12 10:04 ` 答复: " Liuye
2024-03-12 10:24 ` Daniel Thompson [this message]
2024-03-13 1:22 ` 答复: " Liuye
2024-03-13 14:17 ` Daniel Thompson
2024-03-14 7:06 ` 答复: " Liuye
2024-03-14 13:09 ` Daniel Thompson
2024-03-15 9:59 ` 答复: " Liuye
2024-03-16 2:34 ` [PATCH v1] " liu.yec
2024-03-20 16:28 ` Daniel Thompson
2024-03-21 2:26 ` [PATCH V3] " liu.yec
2024-03-21 7:38 ` Greg KH
2024-03-21 7:57 ` 答复: " Liuye
2024-03-21 11:04 ` Daniel Thompson
2024-03-21 11:50 ` [PATCH V4] " liu.yec
2024-03-22 6:54 ` Jiri Slaby
2024-03-22 7:50 ` 答复: " Liuye
2024-03-22 15:58 ` Daniel Thompson
2024-03-23 1:41 ` [PATCH V5] " liu.yec
2024-03-25 16:54 ` Daniel Thompson
2024-03-26 0:47 ` 答复: " Liuye
2024-03-26 7:40 ` [PATCH V6] " liu.yec
2024-03-26 8:22 ` Greg KH
2024-03-26 8:54 ` [PATCH V7] " liu.yec
2024-04-02 12:58 ` Daniel Thompson
2024-04-03 6:11 ` [PATCH V8] " liu.yec
2024-04-03 13:58 ` Daniel Thompson
2024-04-03 22:22 ` Andy Shevchenko
2024-04-08 1:44 ` LiuYe
2024-04-08 10:29 ` Andy Shevchenko
2024-04-09 2:03 ` [PATCH V9] " liu.yec
2024-04-10 2:06 ` [PATCH V10] " liu.yec
2024-04-10 3:59 ` Andy Shevchenko
2024-04-10 5:30 ` Greg KH
2024-04-10 5:54 ` 答复: " Liuye
2024-04-10 5:59 ` Greg KH
2024-04-10 6:10 ` 答复: " Liuye
2024-04-10 6:15 ` Greg KH
2024-04-10 6:30 ` 答复: " Liuye
2024-04-10 7:18 ` [PATCH V11] " liu.yec
2024-04-10 8:24 ` 答复: 答复: 答复: [PATCH V10] " Greg KH
2024-04-10 8:38 ` 答复: " Liuye
2024-03-02 20:44 ` [PATCH] " Greg KH
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