linux-kernel - Re: [Xen-devel] [PATCH v2] xen/grant-table: correctly initialize grant table version 1

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1357732929.7989.250.camel@zakaz.uk.xensource.com>
Date:	Wed, 9 Jan 2013 12:02:09 +0000
From:	Ian Campbell <Ian.Campbell@...rix.com>
To:	ANNIE LI <annie.li@...cle.com>
CC:	Matt Wilson <msw@...zon.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"stable@...r.kernel.org" <stable@...r.kernel.org>,
	"xen-devel@...ts.xen.org" <xen-devel@...ts.xen.org>
Subject: Re: [Xen-devel] [PATCH v2] xen/grant-table: correctly initialize
 grant table version 1

On Wed, 2013-01-09 at 02:40 +0000, ANNIE LI wrote:
> > @@ -1080,18 +1081,18 @@ static void gnttab_request_version(void)
> >   		panic("we need grant tables version 2, but only version 1 is available");
> >   	} else {
> >   		grant_table_version = 1;
> > +		grefs_per_grant_frame = PAGE_SIZE / sizeof(struct grant_entry_v1);
> >   		gnttab_interface =&gnttab_v1_ops;
> >   	}
> > -	printk(KERN_INFO "Grant tables using version %d layout.\n",
> > -		grant_table_version);
> >   }
> >   
> 
> Is it better to keep printk here? In your last patch, you removed it 
> because gnttab_request_version and gnttab_resume are all called in 
> gnttab_init. and gnttab_resume also contains calling of 
> gnttab_request_version. But in this patch, gnttab_setup is used, and 
> does not have this issue now.

Yes, I think we want to print this at both start of day and resume?

Either by adding a print to gnttab_resume() or by keeping the existing
one here in preference to moving it to gnttab_setup(). I'd prefer the
latter to avoid the duplication, unless I'm mistaken and request_version
is called in more than those two locations.

Ian.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/