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Date: Thu, 17 Jul 2014 14:31:56 -0400 From: Jeff Moyer <jmoyer@...hat.com> To: Akinobu Mita <akinobu.mita@...il.com> Cc: linux-kernel@...r.kernel.org, Andrew Morton <akpm@...ux-foundation.org>, Jens Axboe <axboe@...nel.dk>, Alexander Viro <viro@...iv.linux.org.uk>, linux-fsdevel@...r.kernel.org Subject: Re: [PATCH] block_dev: implement readpages() to optimize sequential read Akinobu Mita <akinobu.mita@...il.com> writes: > Sequential read from a block device is expected to be equal or faster > than from the file on a filesystem. But it is not correct due to the > lack of effective readpages() in the address space operations for > block device. Ah, a trip down memory lane. ;-) Here's a thread showing issues with the last time this was proposed (by me, incidentally): https://lkml.org/lkml/2009/6/2/480 At the very least, we need to see numbers on a real device, and see it booted on something with >4k page size before taking this back in. Cheers, Jeff -- 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/
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