From: Keith Busch <keith.busch@intel.com>
To: Christoph Hellwig <hch@lst.de>
Cc: Ming Lin <mlin@kernel.org>,
linux-kernel@vger.kernel.org, Jens Axboe <axboe@kernel.dk>,
Kent Overstreet <kent.overstreet@gmail.com>,
Dongsu Park <dongsu.park@profitbricks.com>,
Christoph Hellwig <hch@infradead.org>,
Al Viro <viro@zeniv.linux.org.uk>,
Ming Lei <ming.lei@canonical.com>, Neil Brown <neilb@suse.de>,
Alasdair Kergon <agk@redhat.com>,
Mike Snitzer <snitzer@redhat.com>,
dm-devel@redhat.com, Lars Ellenberg <drbd-dev@lists.linbit.com>,
drbd-user@lists.linbit.com, Jiri Kosina <jkosina@suse.cz>,
Geoff Levand <geoff@infradead.org>, Jim Paris <jim@jtan.com>,
Joshua Morris <josh.h.morris@us.ibm.com>,
Philip Kelleher <pjk1939@linux.vnet.ibm.com>,
Minchan Kim <minchan@kernel.org>, Nitin Gupta <ngupta@vflare.org>,
Oleg Drokin <oleg.drokin@intel.com>,
Andreas Dilger <andreas.dilger@intel.com>,
Keith Busch <keith.busch@intel.com>
Subject: Re: [PATCH 01/10] block: make generic_make_request handle arbitrarily sized bios
Date: Tue, 28 Apr 2015 16:01:26 +0000 (UTC) [thread overview]
Message-ID: <alpine.LNX.2.00.1504281546340.19844@localhost.lm.intel.com> (raw)
In-Reply-To: <20150428114320.GA9790@lst.de>
On Tue, 28 Apr 2015, Christoph Hellwig wrote:
> This seems to lack support for QUEUE_FLAG_SG_GAPS to work around
> the retarded PPR format in the NVMe driver.
Might strong words, sir! I'm missing the context here, but I'll say PRP
is much more efficient for h/w to process over SGL, and the requirement
comes from that h/w rather than the driver.
next prev parent reply other threads:[~2015-04-28 16:01 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-28 6:48 [RFC PATCH v2 00/10] simplify block layer based on immutable biovecs Ming Lin
2015-04-28 6:48 ` [PATCH 01/10] block: make generic_make_request handle arbitrarily sized bios Ming Lin
2015-04-28 11:43 ` Christoph Hellwig
2015-04-28 16:01 ` Keith Busch [this message]
2015-05-06 6:08 ` Ming Lin
2015-05-06 6:48 ` Christoph Hellwig
2015-05-06 7:13 ` Ming Lin
2015-04-28 6:48 ` [PATCH 02/10] block: simplify bio_add_page() Ming Lin
2015-04-28 12:12 ` Christoph Hellwig
2015-04-29 5:42 ` Ming Lin
2015-04-28 6:48 ` [PATCH 03/10] block: allow __blk_queue_bounce() to handle bios larger than BIO_MAX_PAGES Ming Lin
2015-04-28 6:48 ` [PATCH 04/10] bcache: clean up hacks around bio_split_pool Ming Lin
2015-04-28 12:14 ` Christoph Hellwig
2015-04-28 12:14 ` Christoph Hellwig
2015-04-29 5:43 ` Ming Lin
2015-04-28 6:48 ` [PATCH 05/10] btrfs: remove bio splitting and merge_bvec_fn() calls Ming Lin
2015-04-28 6:48 ` [PATCH 06/10] md/raid5: get rid of bio_fits_rdev() Ming Lin
2015-04-28 6:48 ` [PATCH 07/10] block: kill merge_bvec_fn() completely Ming Lin
2015-04-28 17:31 ` Alasdair G Kergon
2015-04-29 6:32 ` Ming Lin
2015-04-28 22:09 ` NeilBrown
2015-05-04 7:47 ` Ming Lin
2015-05-06 7:10 ` Ming Lin
2015-05-06 7:26 ` Christoph Hellwig
2015-05-06 17:05 ` Ming Lin
2015-04-28 6:48 ` [PATCH 08/10] fs: use helper bio_add_page() instead of open coding on bi_io_vec Ming Lin
2015-04-28 6:48 ` [PATCH 09/10] md/raid10: make sync_request_write() call bio_copy_data() Ming Lin
2015-04-28 6:48 ` [PATCH 10/10] Documentation: update notes in biovecs about arbitrarily sized bios Ming Lin
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