From: William Lee Irwin III <wli@holomorphy.com>
To: David Miller <davem@davemloft.net>
Cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org
Subject: Re: that page count overflow thing
Date: Mon, 21 May 2007 04:37:47 -0700 [thread overview]
Message-ID: <20070521113747.GK19966@holomorphy.com> (raw)
In-Reply-To: <20070519.152649.102577495.davem@davemloft.net>
On Sat, May 19, 2007 at 03:26:49PM -0700, David Miller wrote:
> I think we may be able to fix that one without making the
> counter larger, it's silly overhead for such an extreme
> case IMHO.
> Perhaps it might be possible to just make the counter stick at it's
> maximum, and when it's there we have an rbtree of external "large"
> counters, keyed by page struct address.
> So basically externalize counters that go over the maximally
> representable value. In this way only the idiotic cases pay
> the price.
This could be awkward with allocation requirements. How about an
open-addressed hash table? It can be made so large as to never
need to expand in advance with a very small constant factor space
overhead.
-- wli
next prev parent reply other threads:[~2007-05-21 11:38 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-19 22:26 that page count overflow thing David Miller
2007-05-21 11:37 ` William Lee Irwin III [this message]
2007-05-21 11:50 ` David Miller
2007-05-21 12:16 ` William Lee Irwin III
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=20070521113747.GK19966@holomorphy.com \
--to=wli@holomorphy.com \
--cc=akpm@linux-foundation.org \
--cc=davem@davemloft.net \
--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.