linux-kernel - Re: [PATCH, v3] shmat: introduce flag SHM_MAP_NOT

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

Date:	Wed, 8 Oct 2008 00:05:18 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	"Kirill A. Shutemov" <kirill@...temov.name>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Andi Kleen <andi@...stfloor.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arjan van de Ven <arjan@...radead.org>,
	Hugh Dickins <hugh@...itas.com>,
	Ulrich Drepper <drepper@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH, v3] shmat: introduce flag SHM_MAP_NOT_FIXED

On Tue, 7 Oct 2008 23:10:38 +0200
Andi Kleen <andi@...stfloor.org> wrote:

> > Sorry, no.
> > This description still doesn't explain why this interface is needed.
> > 
> > The one of the points is this interface is used by another person or not.
> > You should explain how large this interface benefit has.
> > 
> > Andi kleen explained this interface _can_  be used another one.
> > but nobody explain who use it actually.
> 
> Anyone who doesn't want to use fixed addresses. 

Can use shm_open and mmap to get POSIX standard shm behaviour via a sane
interface without adding more crap to the sys3 shm madness. 

Sorry this patch is completely bogus - introduce the user programs
involved to 1990s technology. They have to be updated to use such a
change as is proposed anyway so they might as well use shm_open/mmap at
which point no kernel changes are needed.

Alan
--
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/