linux-kernel - Re: [RESEND] powerpc/numa: initialize distance lookup table from drconf path

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]

Message-Id: <20150819231414.BF91C140771@ozlabs.org>
Date:	Thu, 20 Aug 2015 09:14:14 +1000 (AEST)
From:	Michael Ellerman <mpe@...erman.id.au>
To:	Nikunj A Dadhania <nikunj@...ux.vnet.ibm.com>,
	linuxppc-dev@...ts.ozlabs.org
Cc:	anton@...ba.org, linux-kernel@...r.kernel.org,
	nikunj@...ux.vnet.ibm.com, bharata@...ux.vnet.ibm.com
Subject: Re: [RESEND] powerpc/numa: initialize distance lookup table from drconf path

On Thu, 2015-02-07 at 05:39:01 UTC, Nikunj A Dadhania wrote:
> In some situations, a NUMA guest that supports
> ibm,dynamic-memory-reconfiguration node will end up having flat NUMA
> distances between nodes. This is because of two problems in the
> current code.
> 
> 1) Different representations of associativity lists.
> 
>    There is an assumption about the associativity list in
>    initialize_distance_lookup_table(). Associativity list has two forms:
> 
>    a) [cpu,memory]@x/ibm,associativity has following
>       format:
>            <N> <N integers>
> 
>    b) ibm,dynamic-reconfiguration-memory/ibm,associativity-lookup-arrays
> 
>            <M> <N> <M associativity lists each having N integers>
>            M = the number of associativity lists
>            N = the number of entries per associativity list
> 
>    Fix initialize_distance_lookup_table() so that it does not assume
>    "case a". And update the caller to skip the length field before
>    sending the associativity list.
> 
> 2) Distance table not getting updated from drconf path.
> 
>    Node distance table will not get initialized in certain cases as
>    ibm,dynamic-reconfiguration-memory path does not initialize the
>    lookup table.
> 
>    Call initialize_distance_lookup_table() from drconf path with
>    appropriate associativity list.
> 
> Reported-by: Bharata B Rao <bharata@...ux.vnet.ibm.com>
> Signed-off-by: Nikunj A Dadhania <nikunj@...ux.vnet.ibm.com>
> Acked-by: Anton Blanchard <anton@...ba.org>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/1d805440a364b4a68562

cheers
--
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/