linux-kernel - Re: Subject: [PATCH 2/2] EDAC: K8 Memory scrubbing patch

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: Windows password security audit tool. GUI, reports in PDF.

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

Date:	Wed, 3 Jan 2007 20:24:59 +0100
From:	Segher Boessenkool <segher@...nel.crashing.org>
To:	Doug Thompson <norsk5@...oo.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Subject: [PATCH 2/2] EDAC: K8 Memory scrubbing patch

>    One would also expect that cache scrubbing requires hardware
>    support.

You could just write-back invalidate the whole cache
periodically if there is no explicit hardware support
for cache scrubbing.  Less efficient, sure :-)

> Signed-off-by: doug thompson <norsk5@...ssion.com>

Shouldn't you spell your name correctly (with capitalisation)
in the sign off?  It being a formal thing and all.

Some spelling and coding style nits:

> +/* Valid scrub rates for the K8 hardware memory scrubber. We map
> +   maps the scrubbing bandwith to a valid bit pattern. The 'set'

"map maps"

> +   Currently, we only do scrubbing of sdram - the caches are assumed
> +   to be excercised always by running code and if the scrubber is done

"excercised"

> +	   search for the bandwith that is eq or gt than the

"bandwith"

And please just write "greater or equal".

> +	for (i=0; scrubrates[i].bandwidth != SDRATE_EOD; i++) {

i = 0;

> +	/* find the bandwith matching the memory scrubber configuration

"bandwith" again

> +	for (i=0; scrubrates[i].bandwidth != SDRATE_EOD; i++) {

i = 0;

> +	/* the bit pattern is invalid - we might fix it
> +	   by applying the slowest scrub rate as this is
> +	   closest to the valid value, but we do not!

Why not?

> +	if (scrubrates[i].bandwidth == SDRATE_EOD) {
> +		edac_printk(KERN_WARNING, EDAC_MC,
> +				"Invalid sdram scrub control value: %d \n",

Space before the newline.

>  /* FIXME - stolen from msr.c - the calls in msr.c could be exported */

So fix it :-)


Segher

-
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/