linux-kernel - Re: [PATCH 3/4] Staging: zram: allow partial page operations

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Message-ID: <yq1fwnc5pzu.fsf@sermon.lab.mkp.net>
Date:	Tue, 14 Jun 2011 12:36:53 -0400
From:	"Martin K. Petersen" <martin.petersen@...cle.com>
To:	Jeff Moyer <jmoyer@...hat.com>
Cc:	Jerome Marchand <jmarchan@...hat.com>,
	Nitin Gupta <ngupta@...are.org>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Linux Kernel List <linux-kernel@...r.kernel.org>,
	Robert Jennings <rcj@...ux.vnet.ibm.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Jens Axboe <jens.axboe@...cle.com>
Subject: Re: [PATCH 3/4] Staging: zram: allow partial page operations

>>>>> "Jeff" == Jeff Moyer <jmoyer@...hat.com> writes:

Jeff> I don't think there's any reason the logical block size can't be
Jeff> increased.  For zram, so long as you don't care that the minimum
Jeff> I/O size is 64k on these systems (and by you, I mean the users of
Jeff> zram, like file systems, or anything using the block device
Jeff> directly), then it's a fine trade-off to make.

Jeff> Jens, Martin, what do you guys think about bumping the size of the
Jeff> queue_limits.logical_block_size?

When I wrote the code I thought 64K ought to be enough for anybody.

I don't have a problem bumping it as long as people are aware of the
implications bigger blocks have on the filesystems they put on top.

-- 
Martin K. Petersen	Oracle Linux Engineering
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