From: Pekka Enberg <penberg@gmail.com>
To: Jon Smirl <jonsmirl@gmail.com>
Cc: lkml <linux-kernel@vger.kernel.org>, Greg KH <greg@kroah.com>,
Dave Airlie <airlied@linux.ie>,
Pekka Enberg <penberg@cs.helsinki.fi>
Subject: Re: Reusing the slab allocator
Date: Sat, 13 Aug 2005 19:17:50 +0300 [thread overview]
Message-ID: <84144f02050813091719c9c85a@mail.gmail.com> (raw)
In-Reply-To: <9e473391050810092835b3ef27@mail.gmail.com>
On 8/10/05, Jon Smirl <jonsmirl@gmail.com> wrote:
> We need a memory manager for the VRAM on video cards. The most common
> video cards have been 2MB and 512MB memory. Is it possible to reuse
> the kernel slab allocator for managing this memory?
>
> There are a couple of other odd constraints.
> 1) Some objects need to be allocated on boundaries, like 64B or even
> 1KB divisible addresses.
> 2) It would be best if the allocation bookkeeping data structures were
> kept in system RAM. It may not be simple to access VRAM for read/write
> of bookkeeping info. VRAM can require slow PCI cycles or need high
> mem mappings to access.
>
> If possible I'd rather reuse an existing manager than write a new one.
Alternatively, take a look at vmem allocator described in Magazines
and Vmem: Extending the Slab Allocator to Many CPUs and Arbitrary
Resources by Bonwick. AFAIK the slab allocator in Solaris is built on
vmem.
Pekka
prev parent reply other threads:[~2005-08-13 16:17 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-10 16:28 Reusing the slab allocator Jon Smirl
2005-08-13 16:17 ` Pekka Enberg [this message]
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