From: Timur Tabi <ttabi@interactivesi.com>
To: Linux Kernel Mailing list <linux-kernel@vger.kernel.org>
Subject: Should page->count ever be -1?
Date: Wed, 3 Jan 2001 15:07:03 -0600 [thread overview]
Message-ID: <20010103210714Z129267-457+17@vger.kernel.org> (raw)
I'm experiencing some kind of memory leaks playing with ioremap and iounmap,
and I've narrowed down the problem to iounmap refusing to unmap the memory that
I just mapped. The line of code in question is
if (!PageReserved(page) && atomic_dec_and_test(&page->count)) {
from page_alloc.c (this is 2.2.18pre15). It appears that page->count is
already zero when this code is executed, and after it's executed, page->count
becomes -1 (or more accurately, 0xFFFFFFFF). Is this acceptable, or is it an
error condition?
--
Timur Tabi - ttabi@interactivesi.com
Interactive Silicon - http://www.interactivesi.com
When replying to a mailing-list message, please direct the reply to the mailing list only. Don't send another copy to me.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/
next reply other threads:[~2001-01-03 21:07 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-03 21:07 Timur Tabi [this message]
2001-01-03 21:55 ` Should page->count ever be -1? Andrea Arcangeli
2001-01-03 21:59 ` Timur Tabi
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=20010103210714Z129267-457+17@vger.kernel.org \
--to=ttabi@interactivesi.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox