linux-kernel - mm: how to check for kernel pages

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Sun, 4 Feb 2007 12:02:56 +0100
From:	Michal Hocko <mstsxfx@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: mm: how to check for kernel pages

Hi,
is there any effective and fast way how to find out whether page
given by its page frame number is currenly used by (mapped by) kernel?

At the time of checking I can rely that such page:
	- is not buddy allocator page and also not on per CPU lists
	- is not compound page
	- is not reserved page
Because I can check that from struct page's flags.
I was thinking about using rmap code to find all ptes, but I don't know
whether it is not too complicated way.

Thanks for all hints.

Please add me to Cc, because I am not the list member.
Best regards.
-- 
Michal Hocko

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/