From: Timur Tabi <timur.tabi@ammasso.com>
To: linux-mm@kvack.org
Subject: Don't understand vm_page_prot
Date: Fri, 03 Sep 2004 10:40:40 -0500 [thread overview]
Message-ID: <41389078.1080900@ammasso.com> (raw)
I'm reading about vm_area_struct in Mel Gorman's book on the Linux VM,
and he says that the vm_page_prot field in structure vm_area_struct
contains "protection flags that are set for each PTE in this VMA". These
are the _PAGE_xxx flags in pgtable.h.
The problem I have is that these flags describe individual pages. For
instance, _PAGE_DIRTY says that this particular page is dirty. So what
does it mean if _PAGE_DIRTY is set in vm_page_prot? Does that mean that
every page in this VMA is dirty? What if only some of the pages are dirty?
--
Timur Tabi
Staff Software Engineer
timur.tabi@ammasso.com
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"aart@kvack.org"> aart@kvack.org </a>
reply other threads:[~2004-09-03 15:38 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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=41389078.1080900@ammasso.com \
--to=timur.tabi@ammasso.com \
--cc=linux-mm@kvack.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