linux-kernel - Re: [PATCH] Add readpages support for block devices

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-prev] [day] [month] [year] [list]

Date:	Sun, 19 Dec 2010 11:35:52 +0800
From:	Wu Fengguang <fengguang.wu@...el.com>
To:	Christoph Hellwig <hch@....de>
Cc:	Matthew Wilcox <willy@...ux.intel.com>,
	Jens Axboe <jaxboe@...ionio.com>,
	Al Viro <viro@...iv.linux.org.uk>,
	linux-kernel@...r.kernel.org,
	Shane Michael Matthews <shane.matthews@...el.com>,
	Jeff Moyer <jmoyer@...hat.com>, Jens Axboe <axboe@...nel.dk>,
	"Luck, Tony" <tony.luck@...el.com>,
	Florian Mickler <florian@...kler.org>
Subject: Re: [PATCH] Add readpages support for block devices

On Sat, Dec 18, 2010 at 10:20:49AM +0100, Christoph Hellwig wrote:
> We already used to have this and Jens reverted it in commit
> 172124e220f1854acc99ee394671781b8b5e2120.  I can't find a better
> explanation than his rather brief commit message, but he might not more.

The discussion goes here

http://www.gossamer-threads.com/lists/linux/kernel/1085325?do=post_view_threaded#1085325

The problem happens on ext3 fs, non-4k aligned partition and 64K page
size. Jeff also find it hurts dump performance. Then it's reverted
since no one seems to have the time to dig further.

Thanks,
Fengguang
--
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/