linux-kernel - Re: [PATCH] CXL: Fix PSL error due to duplicate segment table entries

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:	Tue, 28 Oct 2014 11:20:20 +1100
From:	Ian Munsie <imunsie@....ibm.com>
To:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
Cc:	mpe <mpe@...erman.id.au>,
	cbe-oss-dev <cbe-oss-dev@...ts.ozlabs.org>,
	mikey <mikey@...ling.org>, arnd <arnd@...db.de>,
	greg <greg@...ah.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linuxppc-dev <linuxppc-dev@...abs.org>, anton <anton@...ba.org>,
	jk <jk@...abs.org>
Subject: Re: [PATCH] CXL: Fix PSL error due to duplicate segment table entries

Excerpts from Aneesh Kumar K.V's message of 2014-10-28 01:38:41 +1100:
> I guess you are missing too many fixes in one patch.
> 
> 1) One cleanup
> 2) Fix for masking ea correctly
> 3) And fix for not erroring out when a slb is already in the slb cache.

ok, I'll split it up

> > +/* This finds a free SSTE and checks to see if it's already in table */
> > +static struct cxl_sste* find_free_sste(struct cxl_context *ctx,
> > +                       struct copro_slb *slb)
> 
> the name is confusing. If you want to keep the name, can you also
> specify that it return NULL, if it finds a matching entry. IIUC that
> is the real part of the fix for the problem mentioned ?

Good point.

> > -    sr = CXL_PSL_SR_An_SC;
> > +    sr = 0;
> 
> What is this change about ?

That tells the PSL not to use the secondary hash since we are no longer
filling out any entries using it. I'll clarify that in the commit
message when I split this out.

Cheers,
-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/