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

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Message-ID: <A5ED84D3BB3A384992CBB9C77DEDA4D414A2B22C@USINDEM103.corp.hds.com>
Date:	Fri, 21 Dec 2012 23:27:00 +0000
From:	Seiji Aguchi <seiji.aguchi@....com>
To:	"Luck, Tony (tony.luck@...el.com)" <tony.luck@...el.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"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>,
	"dzickus@...hat.com" <dzickus@...hat.com>
Subject: RE: [PATCH v3 0/2] pstore,efi_pstore: Avoid deadlock in
 non-blocking paths

Tony,

Could you please apply this patchset to your tree?

Seiji

> -----Original Message-----
> From: Don Zickus [mailto:dzickus@...hat.com]
> Sent: Thursday, December 20, 2012 2:09 PM
> To: Seiji Aguchi
> Cc: linux-kernel@...r.kernel.org; Luck, Tony (tony.luck@...el.com); ccross@...roid.com; keescook@...omium.org;
> cbouatmailru@...il.com; Satoru Moriya; 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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