All of lore.kernel.org
 help / color / mirror / Atom feed
From: Tim Hockin <thockin@sun.com>
To: Pete Zaitcev <zaitcev@redhat.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [BK PATCH 1/2] Remove NGROUPS hardlimit (resend w/o qsort)
Date: Thu, 14 Nov 2002 16:46:36 -0800	[thread overview]
Message-ID: <3DD443EC.2080504@sun.com> (raw)
In-Reply-To: 20021114193156.A2801@devserv.devel.redhat.com

Pete Zaitcev wrote:


> be about time to think about your data structures a little more.
> I'll let Andi to remind you about the performance impact (vmalloc
> area is outside of the big TLB area).

Offer an alternative?  :)  Linked list costs us as much or MORE for 
->next as the gid_t.  kmalloc() doesn't work for previous reasoning.  I 
considered a list of gid arr[256] or similar.  A voice reminds me that 
it doesn't impact us noticably in real use.  Now, maybe other 
architectures will find a good reason to switch to kmalloc() list of 
smaller arrays, and the associated complextities or something else more 
clever.

>>hmm, I haven't heard anything about them - can you offer an email or URL?

> http://www.uwsg.iu.edu/hypermail/linux/kernel/0010.0/0788.html

Thanks - will check it..


-- 
Tim Hockin
Systems Software Engineer
Sun Microsystems, Linux Kernel Engineering
thockin@sun.com


  reply	other threads:[~2002-11-15  0:39 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <mailman.1037316781.6599.linux-kernel2news@redhat.com>
2002-11-15  0:06 ` [BK PATCH 1/2] Remove NGROUPS hardlimit (resend w/o qsort) Pete Zaitcev
2002-11-15  0:14   ` Tim Hockin
2002-11-15  0:31     ` Pete Zaitcev
2002-11-15  0:46       ` Tim Hockin [this message]
2002-11-15  1:19         ` William Lee Irwin III
2002-11-15  1:45           ` Pete Zaitcev
2002-11-15  1:53             ` William Lee Irwin III
     [not found]         ` <3DD44742.2DFE4407@digeo.com>
2002-11-15  1:24           ` Tim Hockin
2002-11-15  1:30             ` Andrew Morton
2002-11-15  2:33               ` Tim Hockin
2002-11-15  2:41                 ` Andrew Morton
2002-11-15 15:13                   ` Alan Cox
2002-11-15  6:00               ` Aaron Lehmann
2002-11-15  1:04       ` Alan Cox
2002-11-15 13:32       ` Frank van Maarseveen
2002-11-14 23:26 Timothy Hockin
2002-11-15 16:30 ` Horst von Brand

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=3DD443EC.2080504@sun.com \
    --to=thockin@sun.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=zaitcev@redhat.com \
    /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.