linux-kernel - [PATCH 0/4] Fix COW D-cache aliasing on fork

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]

Date:	Tue, 12 Dec 2006 17:14:53 +0000
From:	Ralf Baechle <ralf@...ux-mips.org>
To:	Linus Torvalds <torvalds@...l.org>, Andrew Morton <akpm@...l.org>
Cc:	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 0/4] Fix COW D-cache aliasing on fork

This is a respin of the patch series I posted a while ago updated for
today's kernel:

 o patch 1/4 allows an architecture to override the generic
   copy_user_highpage with an architecture specific implementation.  For
   details about the aliasing issue please see the log message of that
   patch.
 o patch 2/4 passes a vma argument to copy_user_highpage.  This allows
   an architecture to optimize its cache handling by looking at the
   vma's VM_EXEC flag.  On architecture that do not make use of this gcc
   will be able to optimize the argument passing away, so no overhead.
 o patch 3/4 uses the facilities of the first two patches to solve the
   alias issue for MIPS
 o patch 4/4 is not a cache alias fix but allows optimizing away the
   cache flush operation in dup_mm().  On a MIPS 34K this accelerates
   fork by 12.5%.
   Since this patch is logically separate from 1-3 it can be applied
   independantly.

  Ralf
-
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/