linux-kernel - Re: Slab allocators: Define common size limitations

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 for Android: free password hash cracker in your pocket

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

Date:	Thu, 17 May 2007 10:45:00 +0200 (CEST)
From:	Geert Uytterhoeven <Geert.Uytterhoeven@...ycom.com>
To:	Arnd Bergmann <arnd@...db.de>
cc:	linuxppc-dev@...abs.org, linux-mm@...ck.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Development <linux-kernel@...r.kernel.org>,
	Christoph Lameter <clameter@....com>
Subject: Re: Slab allocators: Define common size limitations

On Wed, 16 May 2007, Arnd Bergmann wrote:
> On Wednesday 16 May 2007, Geert Uytterhoeven wrote:
> > What are the changes a large allocation will actually succeed?
> > Is there an alignment rule for large allocations?
> > 
> > E.g. for one of the PS3 drivers I need a physically contiguous 256 KiB-aligned
> > block of 256 KiB. Currently I'm using __alloc_bootmem() for that, but maybe
> > kmalloc() becomes a suitable alternative now?
> 
> kmalloc is limited to 128KiB on most architectures. Normally there is no
> need to use it anyway, just use __get_free_pages(). It will generally
> succeed at early boot time, but not after the system has been running
> for some time.

Exactly my understanding. And __get_free_pages() returns PAGE_SIZE-aligned
memory. So I'll keep the current code.

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- Sony Network and Software Technology Center Europe (NSCE)
Geert.Uytterhoeven@...ycom.com ------- The Corporate Village, Da Vincilaan 7-D1
Voice +32-2-7008453 Fax +32-2-7008622 ---------------- B-1935 Zaventem, Belgium
-
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/