From: Borislav Petkov <bp@alien8.de>
To: Xie XiuQi <xiexiuqi@huawei.com>
Cc: "Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com>,
"Chen, Gong" <gong.chen@linux.intel.com>,
tony.luck@intel.com, joe@perches.com, m.chehab@samsung.com,
arozansk@redhat.com, linux-acpi@vger.kernel.org,
linux-kernel@vger.kernel.org, Li Bin <huawei.libin@huawei.com>
Subject: Re: [PATCH v3 4/9] ACPI, x86: Extended error log driver for x86 platform
Date: Fri, 27 Jun 2014 11:22:27 +0200 [thread overview]
Message-ID: <20140627092227.GA23153@pd.tnic> (raw)
In-Reply-To: <53AD0275.7020003@huawei.com>
On Fri, Jun 27, 2014 at 01:34:45PM +0800, Xie XiuQi wrote:
> The call graph is like this,
> do_machine_check
> -> mce_log
> -> atomic_notifier_call_chain(&x86_mce_decoder_chain ...)
> -> ...
> -> extlog_print
> -> print_extlog_rcd
> -> __print_extlog_rcd
> -> printk
>
> There's a logbuf_lock in printk. If logbuf_lock is held by other cpu,
> it'll lead to an infinity spin here. Isn't it?
Yes, but we want to take the risk and print something out before the
machine dies instead of waiting to get into printk-safe context first
and maybe corrupt state.
Besides, there's work currently going on to make printk safe in atomic
context so...
--
Regards/Gruss,
Boris.
Sent from a fat crate under my desk. Formatting is fine.
--
next prev parent reply other threads:[~2014-06-27 9:22 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-18 8:23 [PATCH v3 0/9] Extended H/W error log driver Chen, Gong
2013-10-18 8:23 ` [PATCH v3 1/9] ACPI, APEI, CPER: Fix status check during error printing Chen, Gong
2013-10-18 8:23 ` [PATCH v3 2/9] ACPI, CPER: Update cper info Chen, Gong
2013-10-18 12:39 ` Naveen N. Rao
2013-10-18 8:23 ` [PATCH v3 3/9] bitops: Introduce a more generic BITMASK macro Chen, Gong
2013-10-18 8:23 ` [PATCH v3 4/9] ACPI, x86: Extended error log driver for x86 platform Chen, Gong
2013-10-18 12:37 ` Naveen N. Rao
2013-10-18 12:53 ` Borislav Petkov
2013-10-18 20:57 ` Luck, Tony
2013-10-18 21:27 ` Borislav Petkov
2013-10-18 22:22 ` Luck, Tony
2013-10-19 9:57 ` Borislav Petkov
2013-10-21 19:03 ` Luck, Tony
2013-10-21 22:39 ` Tony Luck
2013-10-22 8:37 ` Borislav Petkov
2013-10-22 9:32 ` Naveen N. Rao
2013-10-19 11:31 ` Chen Gong
2013-10-20 7:06 ` Chen Gong
2013-10-20 8:21 ` Borislav Petkov
2013-10-21 16:27 ` Naveen N. Rao
2013-10-20 7:25 ` [PATCH V4 " Chen, Gong
2014-06-27 5:34 ` [PATCH v3 " Xie XiuQi
2014-06-27 9:22 ` Borislav Petkov [this message]
2014-06-27 20:43 ` Luck, Tony
2014-06-27 21:14 ` Borislav Petkov
2014-06-27 22:10 ` Luck, Tony
2014-06-27 22:14 ` Borislav Petkov
2014-06-30 6:35 ` Xie XiuQi
2013-10-18 8:23 ` [PATCH v3 5/9] DMI: Parse memory device (type 17) in SMBIOS Chen, Gong
2013-10-18 8:23 ` [PATCH v3 6/9] ACPI, APEI, CPER: Add UEFI 2.4 support for memory error Chen, Gong
2013-10-18 8:23 ` [PATCH v3 7/9] ACPI, APEI, CPER: Enhance memory reporting capability Chen, Gong
2013-10-18 8:23 ` [PATCH v3 8/9] ACPI, APEI, CPER: Cleanup CPER memory error output format Chen, Gong
2013-10-18 12:01 ` Naveen N. Rao
2013-10-19 11:26 ` Chen Gong
2013-10-21 16:22 ` Naveen N. Rao
2013-10-21 17:14 ` Luck, Tony
2013-10-22 8:42 ` Borislav Petkov
2013-10-18 8:23 ` [PATCH v3 9/9] EDAC, GHES: Update ghes error record info Chen, Gong
2013-10-18 9:20 ` [PATCH v3 0/9] Extended H/W error log driver Borislav Petkov
2013-10-18 16:17 ` Tony Luck
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