From: Tim Hockin <thockin@hockin.org>
To: akpm@digeo.com (Andrew Morton)
Cc: thockin@sun.com (Tim Hockin),
linux-kernel@vger.kernel.org (Linux Kernel Mailing List)
Subject: Re: [BK PATCH 1/2] Remove NGROUPS hardlimit (resend w/o qsort)
Date: Thu, 14 Nov 2002 18:33:26 -0800 (PST) [thread overview]
Message-ID: <200211150233.gAF2XQv15588@www.hockin.org> (raw)
In-Reply-To: <3DD44E39.4703C2DA@digeo.com> from "Andrew Morton" at Nov 14, 2002 05:30:33 PM
> 10,000 bits isn't much. Maybe:
That's 10000 USED bits. Remember groups are non-contiguously allocated. If
a task is a member of just groups 32767 and 65535, you'll get one bit per
page used, and when they call getgroups() you need to pull it apart and
return an array of gid_t.
> - add `char groups[16]' to task_struct
>
> - add `struct page *groups_page' to task_struct
>
> - then
> if (getsetsize <= 256)
> use current->groups[] /* 256 groups max */
> else
> use current->groups_page; /* 32768 groups max */
next prev parent reply other threads:[~2002-11-15 2:26 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 ` Pete Zaitcev
2002-11-15 0:14 ` Tim Hockin
2002-11-15 0:31 ` Pete Zaitcev
2002-11-15 0:46 ` Tim Hockin
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 [this message]
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
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