linux-kernel - [PATCH 0/8] THP support for Sparc64

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-next>] [day] [month] [year] [list]

Message-Id: <20121002.182601.845433592794197720.davem@davemloft.net>
Date:	Tue, 02 Oct 2012 18:26:01 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	linux-mm@...ck.org
CC:	sparclinux@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org, akpm@...ux-foundation.org,
	aarcange@...hat.com, hannes@...xchg.org
Subject: [PATCH 0/8] THP support for Sparc64

Here is a set of patches that add THP support for sparc64.

A few of them are relatively minor portability issues I ran into.
Like the MIPS guys I hit the update_mmu_cache() typing issue so I have
a patch for that here.

It is very likely that I need the ACCESSED bit handling fix the
ARM folks have been posting recently as well.

On the sparc64 side the biggest issue was moving to only supporting
4MB pages and then realigning the page tables so that the PMDs map 4MB
(instead of 8MB as they do now).

The rest was just trial and error, running tests, and fixing bugs.

A familiar test case that makes 5 million random accesses to a 1GB
memory area goes from 20 seconds down to 0.43 seconds with THP enabled
on my SPARC T4-2 box.

Signed-off-by: David S. Miller <davem@...emloft.net>
--
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/