linux-kernel - Re: [Xen-devel] Re: [PATCH 2/3] xen/granttable: Grant tables V2 implementation

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Date:	Mon, 21 Nov 2011 17:51:15 +0800
From:	ANNIE LI <annie.li@...cle.com>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
CC:	Ian Campbell <Ian.Campbell@...rix.com>,
	"jeremy@...p.org" <jeremy@...p.org>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
	"kurt.hackel@...cle.com" <kurt.hackel@...cle.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Paul Durrant <Paul.Durrant@...rix.com>
Subject: Re: [Xen-devel] Re: [PATCH 2/3] xen/granttable: Grant tables V2 implementation


> The idea is just to have one function. Whichever prints the
> string and panics the machine. If 'panic' does this properly
> (and properly meaning it actually prints data when using
> the earlyprintk=xen as well as console=hvc0) printout system
> the we cuold just use 'panic' and not worry about it.
>
>
> But if it does not, then we (and by we I mean you) should
> provide a variant of panic() that prints the data properly using the
> earlprintk mechanism. Preferrabily to make it generic.
I did a simple test, a serial cable was connected,  and console=hvc0 was 
added in grub.conf.
Whether earlyprintk=xen is set or not, both panic() and xen_raw_printk 
all can print out strings in gnttab_request_version of grant-table.c.

So I changed the

xen_raw_printk();
panic();

back to

panic();

Other change is the re-arrange "else if" format in 
gnttab_request_version function.

Please refer to the patch attached.

Thanks
Annie

View attachment "0003-xen-granttable-Grant-tables-V2-implementation.patch" of type "text/plain" (12145 bytes)