From: Russell King <rmk@arm.linux.org.uk>
To: "Adam J. Richter" <adam@yggdrasil.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: pci_alloc_consistent for small allocations?
Date: Sun, 2 Sep 2001 16:15:50 +0100 [thread overview]
Message-ID: <20010902161550.C11463@flint.arm.linux.org.uk> (raw)
In-Reply-To: <200109021508.IAA29875@adam.yggdrasil.com>
In-Reply-To: <200109021508.IAA29875@adam.yggdrasil.com>; from adam@yggdrasil.com on Sun, Sep 02, 2001 at 08:08:00AM -0700
On Sun, Sep 02, 2001 at 08:08:00AM -0700, Adam J. Richter wrote:
> In looking at the ieee1394 OHCI driver, I noticed that it
> appears to make 104 calls to pci_alloc_consistent for data structures
> that are 16 or 64 bytes. Currently, on x86, pci_alloc_consistent
> allocates at least one full page per call, so it looks like the
> ohci1394 driver allocates 416kB per controller as a result of these
> data structures.
You might want to look through the PCI stuff in drivers/pci - there's a
generic method for handling this on USB already.
--
Russell King (rmk@arm.linux.org.uk) The developer of ARM Linux
http://www.arm.linux.org.uk/personal/aboutme.html
next prev parent reply other threads:[~2001-09-02 15:15 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-09-02 15:08 pci_alloc_consistent for small allocations? Adam J. Richter
2001-09-02 15:15 ` Russell King [this message]
2001-09-02 16:43 ` Johannes Erdfelt
2001-09-02 23:05 ` David S. Miller
[not found] <mailman.999443581.14164.linux-kernel2news@redhat.com>
2001-09-04 0:20 ` Pete Zaitcev
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20010902161550.C11463@flint.arm.linux.org.uk \
--to=rmk@arm.linux.org.uk \
--cc=adam@yggdrasil.com \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.