linux-kernel - Re: [PATCH v3 0/2] pstore,efi_pstore: Avoid deadlock in non-blocking paths

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Message-ID: <20121220190923.GP88797@redhat.com>
Date:	Thu, 20 Dec 2012 14:09:23 -0500
From:	Don Zickus <dzickus@...hat.com>
To:	Seiji Aguchi <seiji.aguchi@....com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Luck, Tony (tony.luck@...el.com)" <tony.luck@...el.com>,
	"ccross@...roid.com" <ccross@...roid.com>,
	"keescook@...omium.org" <keescook@...omium.org>,
	"cbouatmailru@...il.com" <cbouatmailru@...il.com>,
	Satoru Moriya <satoru.moriya@....com>,
	"dle-develop@...ts.sourceforge.net" 
	<dle-develop@...ts.sourceforge.net>
Subject: Re: [PATCH v3 0/2] pstore,efi_pstore: Avoid deadlock in non-blocking
 paths

On Thu, Dec 20, 2012 at 03:11:14PM +0000, Seiji Aguchi wrote:
> Changelog 
> v2 -> v3
>  - Merge modifications of pstore part in 2/2 to 1/2.
>  - Rename pstore_is_non_blocking_path() to pstore_cannot_block_path().
> 
> v1 -> v2
>  - Erase a logic checking the number of online cpus.
>  - Create a patchset to fix deadlocking issue in both pstore filesystem and
>    efi_pstore driver.
>    - Introduce a function, is_non_blocking_path(), to check if pstore 
>      is in panic and emergency-restart paths (PATCH 1/2)
>    - Avoid efi_pstore_driver is blocked in non-blocking paths
>      such as nmi, panic and emergency-restart paths (PATCH 2/2)
> 
> [Issue]
> 
> There are some paths in kernel which shouldn't be blocked, 
> like NMI, panic case after stopping cpus, emergency-restart.

I am ok with it.

Acked-by: Don Zickus <dzickus@...hat.com>
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