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From: "Guilherme G. Piccoli" <gpiccoli@igalia.com>
To: kexec@lists.infradead.org, linux-um@lists.infradead.org,
	Johannes Berg <johannes@sipsolutions.net>
Cc: pmladek@suse.com, bhe@redhat.com, akpm@linux-foundation.org,
	linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org,
	netdev@vger.kernel.org, x86@kernel.org, kernel-dev@igalia.com,
	kernel@gpiccoli.net, halves@canonical.com, fabiomirmar@gmail.com,
	alejandro.j.jimenez@oracle.com,
	andriy.shevchenko@linux.intel.com, arnd@arndb.de, bp@alien8.de,
	corbet@lwn.net, d.hatayama@jp.fujitsu.com,
	dave.hansen@linux.intel.com, dyoung@redhat.com,
	feng.tang@intel.com, gregkh@linuxfoundation.org,
	mikelley@microsoft.com, hidehiro.kawai.ez@hitachi.com,
	jgross@suse.com, john.ogness@linutronix.de,
	keescook@chromium.org, luto@kernel.org, mhiramat@kernel.org,
	mingo@redhat.com, paulmck@kernel.org, peterz@infradead.org,
	rostedt@goodmis.org, senozhatsky@chromium.org,
	stern@rowland.harvard.edu, tglx@linutronix.de, vgoyal@redhat.com,
	vkuznets@redhat.com, will@kernel.org,
	Anton Ivanov <anton.ivanov@cambridgegreys.com>,
	Richard Weinberger <richard@nod.at>
Subject: Re: [PATCH v2 06/13] um: Improve panic notifiers consistency and ordering
Date: Sun, 7 Aug 2022 12:40:17 -0300	[thread overview]
Message-ID: <5bbc4296-4858-d01c-0c76-09d942377ddf@igalia.com> (raw)
In-Reply-To: <20220719195325.402745-7-gpiccoli@igalia.com>

On 19/07/2022 16:53, Guilherme G. Piccoli wrote:
> Currently the panic notifiers from user mode linux don't follow
> the convention for most of the other notifiers present in the
> kernel (indentation, priority setting, numeric return).
> More important, the priorities could be improved, since it's a
> special case (userspace), hence we could run the notifiers earlier;
> user mode linux shouldn't care much with other panic notifiers but
> the ordering among the mconsole and arch notifier is important,
> given that the arch one effectively triggers a core dump.
> 
> Fix that by running the mconsole notifier as the first panic
> notifier, followed by the architecture one (that coredumps).
> 
> Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
> Cc: Johannes Berg <johannes@sipsolutions.net>
> Cc: Richard Weinberger <richard@nod.at>
> Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com>
> 
> ---
> 
> V2:
> - Kept the notifier header to avoid implicit usage - thanks
> Johannes for the suggestion!
> 
>  arch/um/drivers/mconsole_kern.c | 7 +++----
>  arch/um/kernel/um_arch.c        | 8 ++++----
>  2 files changed, 7 insertions(+), 8 deletions(-)
> [...]

Hi Johannes, do you feel this one is good now, after your last review?
Thanks in advance,


Guilherme

WARNING: multiple messages have this Message-ID (diff)
From: "Guilherme G. Piccoli" <gpiccoli@igalia.com>
To: kexec@lists.infradead.org, linux-um@lists.infradead.org,
	Johannes Berg <johannes@sipsolutions.net>
Cc: pmladek@suse.com, bhe@redhat.com, akpm@linux-foundation.org,
	linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org,
	netdev@vger.kernel.org, x86@kernel.org, kernel-dev@igalia.com,
	kernel@gpiccoli.net, halves@canonical.com, fabiomirmar@gmail.com,
	alejandro.j.jimenez@oracle.com,
	andriy.shevchenko@linux.intel.com, arnd@arndb.de, bp@alien8.de,
	corbet@lwn.net, d.hatayama@jp.fujitsu.com,
	dave.hansen@linux.intel.com, dyoung@redhat.com,
	feng.tang@intel.com, gregkh@linuxfoundation.org,
	mikelley@microsoft.com, hidehiro.kawai.ez@hitachi.com,
	jgross@suse.com, john.ogness@linutronix.de,
	keescook@chromium.org, luto@kernel.org, mhiramat@kernel.org,
	mingo@redhat.com, paulmck@kernel.org, peterz@infradead.org,
	rostedt@goodmis.org, senozhatsky@chromium.org,
	stern@rowland.harvard.edu, tglx@linutronix.de, vgoyal@redhat.com,
	vkuznets@redhat.com, will@kernel.org,
	Anton Ivanov <anton.ivanov@cambridgegreys.com>,
	Richard Weinberger <richard@nod.at>
Subject: Re: [PATCH v2 06/13] um: Improve panic notifiers consistency and ordering
Date: Sun, 7 Aug 2022 12:40:17 -0300	[thread overview]
Message-ID: <5bbc4296-4858-d01c-0c76-09d942377ddf@igalia.com> (raw)
In-Reply-To: <20220719195325.402745-7-gpiccoli@igalia.com>

On 19/07/2022 16:53, Guilherme G. Piccoli wrote:
> Currently the panic notifiers from user mode linux don't follow
> the convention for most of the other notifiers present in the
> kernel (indentation, priority setting, numeric return).
> More important, the priorities could be improved, since it's a
> special case (userspace), hence we could run the notifiers earlier;
> user mode linux shouldn't care much with other panic notifiers but
> the ordering among the mconsole and arch notifier is important,
> given that the arch one effectively triggers a core dump.
> 
> Fix that by running the mconsole notifier as the first panic
> notifier, followed by the architecture one (that coredumps).
> 
> Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
> Cc: Johannes Berg <johannes@sipsolutions.net>
> Cc: Richard Weinberger <richard@nod.at>
> Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com>
> 
> ---
> 
> V2:
> - Kept the notifier header to avoid implicit usage - thanks
> Johannes for the suggestion!
> 
>  arch/um/drivers/mconsole_kern.c | 7 +++----
>  arch/um/kernel/um_arch.c        | 8 ++++----
>  2 files changed, 7 insertions(+), 8 deletions(-)
> [...]

Hi Johannes, do you feel this one is good now, after your last review?
Thanks in advance,


Guilherme

_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec

WARNING: multiple messages have this Message-ID (diff)
From: "Guilherme G. Piccoli" <gpiccoli@igalia.com>
To: kexec@lists.infradead.org, linux-um@lists.infradead.org,
	Johannes Berg <johannes@sipsolutions.net>
Cc: pmladek@suse.com, bhe@redhat.com, akpm@linux-foundation.org,
	linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org,
	netdev@vger.kernel.org, x86@kernel.org, kernel-dev@igalia.com,
	kernel@gpiccoli.net, halves@canonical.com, fabiomirmar@gmail.com,
	alejandro.j.jimenez@oracle.com,
	andriy.shevchenko@linux.intel.com, arnd@arndb.de, bp@alien8.de,
	corbet@lwn.net, d.hatayama@jp.fujitsu.com,
	dave.hansen@linux.intel.com, dyoung@redhat.com,
	feng.tang@intel.com, gregkh@linuxfoundation.org,
	mikelley@microsoft.com, hidehiro.kawai.ez@hitachi.com,
	jgross@suse.com, john.ogness@linutronix.de,
	keescook@chromium.org, luto@kernel.org, mhiramat@kernel.org,
	mingo@redhat.com, paulmck@kernel.org, peterz@infradead.org,
	rostedt@goodmis.org, senozhatsky@chromium.org,
	stern@rowland.harvard.edu, tglx@linutronix.de, vgoyal@redhat.com,
	vkuznets@redhat.com, will@kernel.org,
	Anton Ivanov <anton.ivanov@cambridgegreys.com>,
	Richard Weinberger <richard@nod.at>
Subject: Re: [PATCH v2 06/13] um: Improve panic notifiers consistency and ordering
Date: Sun, 7 Aug 2022 12:40:17 -0300	[thread overview]
Message-ID: <5bbc4296-4858-d01c-0c76-09d942377ddf@igalia.com> (raw)
In-Reply-To: <20220719195325.402745-7-gpiccoli@igalia.com>

On 19/07/2022 16:53, Guilherme G. Piccoli wrote:
> Currently the panic notifiers from user mode linux don't follow
> the convention for most of the other notifiers present in the
> kernel (indentation, priority setting, numeric return).
> More important, the priorities could be improved, since it's a
> special case (userspace), hence we could run the notifiers earlier;
> user mode linux shouldn't care much with other panic notifiers but
> the ordering among the mconsole and arch notifier is important,
> given that the arch one effectively triggers a core dump.
> 
> Fix that by running the mconsole notifier as the first panic
> notifier, followed by the architecture one (that coredumps).
> 
> Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
> Cc: Johannes Berg <johannes@sipsolutions.net>
> Cc: Richard Weinberger <richard@nod.at>
> Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com>
> 
> ---
> 
> V2:
> - Kept the notifier header to avoid implicit usage - thanks
> Johannes for the suggestion!
> 
>  arch/um/drivers/mconsole_kern.c | 7 +++----
>  arch/um/kernel/um_arch.c        | 8 ++++----
>  2 files changed, 7 insertions(+), 8 deletions(-)
> [...]

Hi Johannes, do you feel this one is good now, after your last review?
Thanks in advance,


Guilherme

_______________________________________________
linux-um mailing list
linux-um@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-um


  reply	other threads:[~2022-08-07 15:40 UTC|newest]

Thread overview: 142+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-07-19 19:53 [PATCH v2 00/13] The panic notifiers refactor strikes back - fixes/clean-ups Guilherme G. Piccoli
2022-07-19 19:53 ` Guilherme G. Piccoli
2022-07-19 19:53 ` Guilherme G. Piccoli
2022-07-19 19:53 ` Guilherme G. Piccoli
2022-07-19 19:53 ` Guilherme G. Piccoli
2022-07-19 19:53 ` [PATCH v2 01/13] ARM: Disable FIQs (but not IRQs) on CPUs shutdown paths Guilherme G. Piccoli
2022-07-19 19:53   ` Guilherme G. Piccoli
2022-07-19 19:53   ` Guilherme G. Piccoli
2022-08-07 15:35   ` Guilherme G. Piccoli
2022-08-07 15:35     ` Guilherme G. Piccoli
2022-08-07 15:35     ` Guilherme G. Piccoli
2022-07-19 19:53 ` [PATCH v2 02/13] notifier: Add panic notifiers info and purge trailing whitespaces Guilherme G. Piccoli
2022-07-19 19:53   ` Guilherme G. Piccoli
2022-08-03  9:21   ` Baoquan He
2022-08-03  9:21     ` Baoquan He
2022-07-19 19:53 ` [PATCH v2 03/13] firmware: google: Test spinlock on panic path to avoid lockups Guilherme G. Piccoli
2022-07-19 19:53   ` Guilherme G. Piccoli
2022-08-07 15:38   ` Guilherme G. Piccoli
2022-08-07 15:38     ` Guilherme G. Piccoli
2022-08-08  5:07   ` Evan Green
2022-08-08  5:07     ` Evan Green
2022-08-08 15:14     ` Guilherme G. Piccoli
2022-08-08 15:14       ` Guilherme G. Piccoli
2022-08-08 15:26       ` Greg Kroah-Hartman
2022-08-08 15:26         ` Greg Kroah-Hartman
2022-08-08 15:37         ` Guilherme G. Piccoli
2022-08-08 15:37           ` Guilherme G. Piccoli
2022-08-10 12:54           ` Greg Kroah-Hartman
2022-08-10 12:54             ` Greg Kroah-Hartman
2022-07-19 19:53 ` [PATCH v2 04/13] soc: bcm: brcmstb: Document panic notifier action and remove useless header Guilherme G. Piccoli
2022-07-19 19:53   ` Guilherme G. Piccoli
2022-07-20 23:00   ` Florian Fainelli
2022-07-20 23:00     ` Florian Fainelli
2022-07-21 13:17     ` Guilherme G. Piccoli
2022-07-21 13:17       ` Guilherme G. Piccoli
2022-07-19 19:53 ` [PATCH v2 05/13] alpha: Clean-up the panic notifier code Guilherme G. Piccoli
2022-07-19 19:53   ` Guilherme G. Piccoli
2022-07-19 19:53   ` Guilherme G. Piccoli
2022-07-19 19:53 ` [PATCH v2 06/13] um: Improve panic notifiers consistency and ordering Guilherme G. Piccoli
2022-07-19 19:53   ` Guilherme G. Piccoli
2022-07-19 19:53   ` Guilherme G. Piccoli
2022-08-07 15:40   ` Guilherme G. Piccoli [this message]
2022-08-07 15:40     ` Guilherme G. Piccoli
2022-08-07 15:40     ` Guilherme G. Piccoli
2022-08-09 18:09     ` Johannes Berg
2022-08-09 18:09       ` Johannes Berg
2022-08-09 18:09       ` Johannes Berg
2022-08-09 19:03       ` Guilherme G. Piccoli
2022-08-09 19:03         ` Guilherme G. Piccoli
2022-08-09 19:03         ` Guilherme G. Piccoli
2022-08-09 19:08         ` Johannes Berg
2022-08-09 19:08           ` Johannes Berg
2022-08-09 19:08           ` Johannes Berg
2022-08-09 19:45           ` Guilherme G. Piccoli
2022-08-09 19:45             ` Guilherme G. Piccoli
2022-08-09 19:45             ` Guilherme G. Piccoli
2022-07-19 19:53 ` [PATCH v2 07/13] parisc: Replace regular spinlock with spin_trylock on panic path Guilherme G. Piccoli
2022-07-19 19:53   ` Guilherme G. Piccoli
2022-07-20  1:43   ` Jeroen Roovers
2022-07-20  1:43     ` Jeroen Roovers
2022-07-21 13:19     ` Guilherme G. Piccoli
2022-07-21 13:19       ` Guilherme G. Piccoli
2022-07-21 13:45       ` Helge Deller
2022-07-21 13:45         ` Helge Deller
2022-07-21 14:00         ` Guilherme G. Piccoli
2022-07-21 14:00           ` Guilherme G. Piccoli
2022-07-19 19:53 ` [PATCH v2 08/13] tracing: Improve panic/die notifiers Guilherme G. Piccoli
2022-07-19 19:53   ` Guilherme G. Piccoli
2022-08-03  9:36   ` Baoquan He
2022-08-03  9:36     ` Baoquan He
2022-08-03  9:52     ` Baoquan He
2022-08-03  9:52       ` Baoquan He
2022-08-03 11:44       ` Guilherme G. Piccoli
2022-08-03 11:44         ` Guilherme G. Piccoli
2022-08-07 15:46   ` Guilherme G. Piccoli
2022-08-07 15:46     ` Guilherme G. Piccoli
2022-08-16 14:14   ` Steven Rostedt
2022-08-16 14:14     ` Steven Rostedt
2022-08-16 14:57     ` Alan Stern
2022-08-16 14:57       ` Alan Stern
2022-08-16 15:52       ` Steven Rostedt
2022-08-16 15:52         ` Steven Rostedt
2022-08-16 20:12         ` Guilherme G. Piccoli
2022-08-16 20:12           ` Guilherme G. Piccoli
2022-07-19 19:53 ` [PATCH v2 09/13] notifier: Show function names on notifier routines if DEBUG_NOTIFIERS is set Guilherme G. Piccoli
2022-07-19 19:53   ` Guilherme G. Piccoli
2022-07-19 20:33   ` Arjan van de Ven
2022-07-19 20:33     ` Arjan van de Ven
2022-07-19 20:44     ` Guilherme G. Piccoli
2022-07-19 20:44       ` Guilherme G. Piccoli
2022-07-19 20:48       ` Arjan van de Ven
2022-07-19 20:48         ` Arjan van de Ven
2022-07-19 21:00         ` Guilherme G. Piccoli
2022-07-19 21:00           ` Guilherme G. Piccoli
2022-07-19 22:04           ` Arjan van de Ven
2022-07-19 22:04             ` Arjan van de Ven
2022-07-21 13:20             ` Guilherme G. Piccoli
2022-07-21 13:20               ` Guilherme G. Piccoli
2022-07-19 19:53 ` [PATCH v2 10/13] EDAC/altera: Skip the panic notifier if kdump is loaded Guilherme G. Piccoli
2022-07-19 19:53   ` Guilherme G. Piccoli
2022-08-07 15:48   ` Guilherme G. Piccoli
2022-08-07 15:48     ` Guilherme G. Piccoli
2022-08-16 18:44   ` Dinh Nguyen
2022-08-16 18:44     ` Dinh Nguyen
2022-08-16 20:16     ` Guilherme G. Piccoli
2022-08-16 20:16       ` Guilherme G. Piccoli
2022-08-17 17:31   ` Borislav Petkov
2022-08-17 17:31     ` Borislav Petkov
2022-08-17 18:45     ` Guilherme G. Piccoli
2022-08-17 18:45       ` Guilherme G. Piccoli
2022-08-17 19:34       ` Borislav Petkov
2022-08-17 19:34         ` Borislav Petkov
2022-08-17 20:28         ` Guilherme G. Piccoli
2022-08-17 20:28           ` Guilherme G. Piccoli
2022-08-17 21:02           ` Borislav Petkov
2022-08-17 21:02             ` Borislav Petkov
2022-08-17 21:39             ` Guilherme G. Piccoli
2022-08-17 21:39               ` Guilherme G. Piccoli
2022-08-17 21:46               ` Borislav Petkov
2022-08-17 21:46                 ` Borislav Petkov
2022-08-17 21:56                 ` Guilherme G. Piccoli
2022-08-17 21:56                   ` Guilherme G. Piccoli
2022-08-17 22:00                   ` Borislav Petkov
2022-08-17 22:00                     ` Borislav Petkov
2022-08-17 22:09                     ` Guilherme G. Piccoli
2022-08-17 22:09                       ` Guilherme G. Piccoli
2022-08-17 22:19                       ` Borislav Petkov
2022-08-17 22:19                         ` Borislav Petkov
2022-08-17 22:49                         ` Guilherme G. Piccoli
2022-08-17 22:49                           ` Guilherme G. Piccoli
2022-07-19 19:53 ` [PATCH v2 11/13] video/hyperv_fb: Avoid taking busy spinlock on panic path Guilherme G. Piccoli
2022-07-19 19:53   ` Guilherme G. Piccoli
2022-07-25 18:09   ` Michael Kelley (LINUX)
2022-07-25 18:09     ` Michael Kelley (LINUX)
2022-07-25 22:05     ` Guilherme G. Piccoli
2022-07-25 22:05       ` Guilherme G. Piccoli
2022-07-19 19:53 ` [PATCH v2 12/13] drivers/hv/vmbus, video/hyperv_fb: Untangle and refactor Hyper-V panic notifiers Guilherme G. Piccoli
2022-07-19 19:53   ` Guilherme G. Piccoli
2022-07-25 18:55   ` Michael Kelley (LINUX)
2022-07-25 18:55     ` Michael Kelley (LINUX)
2022-07-19 19:53 ` [PATCH v2 13/13] panic: Fixes the panic_print NMI backtrace setting Guilherme G. Piccoli
2022-07-19 19:53   ` Guilherme G. Piccoli

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