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  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Tue, 19 Jun 2007 15:50:05 -0600
From:	Andreas Dilger <adilger@...sterfs.com>
To:	Dmitry Monakhov <dmonakhov@...ru>
Cc:	Alex Tomas <alex@...sterfs.com>, cmm@...ibm.com,
	linux-ext4@...r.kernel.org
Subject: Re: delayed allocatiou result in Oops

On Jun 19, 2007  13:16 +0400, Dmitry Monakhov wrote:
> But whole approach based on using PagePrivate bit and page->private
> ptr for special purposes is realy dengerous, and imho wrong,
> because avery fs-related code assume that page->private points to
> page_buffers.

This is actually a misconception.  page->private can be anything.  While
many fs helper routines use page->private as buffers, that only happens
when the fs itself causes those helper routines to be called.  Lustre,
for example, has no buffer heads on the clients, and uses page->private
to track RPC batching information and data checksums.

Cheers, Andreas
--
Andreas Dilger
Principal Software Engineer
Cluster File Systems, Inc.

-
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Powered by blists - more mailing lists