From: Arnd Bergmann <arnd@arndb.de>
To: linuxppc-dev@ozlabs.org, michael@ellerman.id.au
Cc: Paul Mackerras <paulus@samba.org>, Michael Neuling <mikey@neuling.org>
Subject: Re: [PATCH] powerpc: force 4k update_flash block and list sizes
Date: Wed, 8 Nov 2006 10:28:31 +0100 [thread overview]
Message-ID: <200611081028.32038.arnd@arndb.de> (raw)
In-Reply-To: <1162960860.20271.13.camel@localhost.localdomain>
On Wednesday 08 November 2006 05:41, Michael Ellerman wrote:
> Just being picky .. but why did you decide to use the slab cache? Does
> it make the code neater? I would have thought you could guarantee 4k
> alignment some other way, and it seems slightly odd to use the slab
> cache for something you only do once ..
There are not so many allocators available. kmalloc does not guarantee
alignment beyond a few bytes and the buddy allocator and vmalloc don't
give you allocations smaller than PAGE_SIZE.
The ehca people had the same problem, and I could imagine there are
others with similar issues. How about adding a special slab allocator
architecture-wide that gives out aligned 4k chunks independent of
page size?
Arnd <>z
next prev parent reply other threads:[~2006-11-08 9:28 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-07 23:53 [PATCH] powerpc: force 4k update_flash block and list sizes John Rose
2006-11-08 2:06 ` Michael Neuling
2006-11-08 4:30 ` John Rose
2006-11-08 4:39 ` Michael Neuling
2006-11-08 16:07 ` John Rose
2006-11-08 4:41 ` Michael Ellerman
2006-11-08 9:28 ` Arnd Bergmann [this message]
2006-11-08 22:40 ` Michael Ellerman
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