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  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Mon, 7 Apr 2014 16:32:39 +0100
From:	David Vrabel <>
To:	Mel Gorman <>
CC:	Linus Torvalds <>,
	Cyrill Gorcunov <>,
	Peter Anvin <>, Ingo Molnar <>,
	Steven Noonan <>,
	Rik van Riel <>,
	Andrew Morton <>,
	Peter Zijlstra <>,
	Andrea Arcangeli <>,
	Linux-MM <>, Linux-X86 <>,
	LKML <>
Subject: Re: [PATCH 2/3] x86: Define _PAGE_NUMA with unused physical address
 bits PMD and PTE levels

On 07/04/14 16:10, Mel Gorman wrote:
> _PAGE_NUMA is currently an alias of _PROT_PROTNONE to trap NUMA hinting
> faults. As the bit is shared care is taken that _PAGE_NUMA is only used in
> places where _PAGE_PROTNONE could not reach but this still causes problems
> on Xen and conceptually difficult.

The problem with Xen guests occurred because mprotect() /was/ confusing
PROTNONE mappings with _PAGE_NUMA and clearing the non-existant NUMA hints.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

Powered by blists - more mailing lists