linux-kernel - Re: [dm-devel] [PATCH 1/3] block: Add blk_queue_copy

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

Message-ID: <yq1k4zt5o2f.fsf@sermon.lab.mkp.net>
Date:	Sun, 20 Sep 2009 17:00:24 -0400
From:	"Martin K. Petersen" <martin.petersen@...cle.com>
To:	device-mapper development <dm-devel@...hat.com>
Cc:	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Mike Snitzer <snitzer@...hat.com>,
	linux-kernel@...r.kernel.org, Alasdair G Kergon <agk@...hat.com>,
	Jens Axboe <jens.axboe@...cle.com>
Subject: Re: [dm-devel] [PATCH 1/3] block: Add blk_queue_copy_limits()

>>>>> "Jun'ichi" == Jun'ichi Nomura <j-nomura@...jp.nec.com> writes:

Jun'ichi> Umm, with this, BLK_DEF_MAX_SECTORS becomes upper bound of
Jun'ichi> max_hw_sectors and the values of underlying devices are not
Jun'ichi> propagated to the stacking devices.  

Well, max_sectors is already bounded by this.  max_hw_sectors only
really matters for PC commands, so I'm not sure it's a big deal for
DM. But I guess we could set the default max_hw_sectors to -1.

I'm just trying to avoid these scattered if-0-set-it-to-something-else
cases.  I'd much rather have the defaults do the right thing.

-- 
Martin K. Petersen	Oracle Linux Engineering
--
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/