From: Christoph Hellwig <hch@infradead.org>
To: Dongsu Park <dongsu.park@profitbricks.com>
Cc: Christoph Hellwig <hch@infradead.org>,
linux-kernel@vger.kernel.org, Jens Axboe <axboe@kernel.dk>,
Kent Overstreet <kmo@daterainc.com>, Ming Lin <mlin@minggr.net>,
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, drbd-dev@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>
Subject: Re: [RFC PATCH 01/17] block: make generic_make_request handle arbitrarily sized bios
Date: Sat, 27 Dec 2014 07:02:07 -0800 [thread overview]
Message-ID: <20141227150207.GC1094@infradead.org> (raw)
In-Reply-To: <20141223114140.GB15080@gmail.com>
On Tue, Dec 23, 2014 at 12:41:40PM +0100, Dongsu Park wrote:
> You mean, checking rq->cmd_type == REQ_TYPE_BLOCK_PC, right?
>
> I'm wondering about how to check that in blk_queue_split().
> At the moment when blk_queue_split() is called, it's even before a request
> is mapped e.g. in blk_sq_make_request().
> Unlike scsi drivers where it's easy to get cmd->rq, blk_queue_split()
> doesn't seem to be able to get a request by blk_get_request().
>
> Or am I missing something?
You're probably missing what I didn't notice either: BLOCK_PC requests
are never sent through ->make_request. Consider my comment withdrawn
and sorry for the confusion.
next prev parent reply other threads:[~2014-12-27 15:02 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-22 11:48 [RFC PATCH 00/17] simplify block layer based on immutable biovecs Dongsu Park
2014-12-22 11:48 ` [RFC PATCH 01/17] block: make generic_make_request handle arbitrarily sized bios Dongsu Park
2014-12-23 10:16 ` Christoph Hellwig
2014-12-23 11:41 ` Dongsu Park
2014-12-27 15:02 ` Christoph Hellwig [this message]
2014-12-23 19:14 ` Geoff Levand
2014-12-24 10:37 ` Dongsu Park
2014-12-25 6:09 ` Ming Lei
2014-12-22 11:48 ` [RFC PATCH 02/17] block: simplify bio_add_page() Dongsu Park
2014-12-23 10:22 ` Christoph Hellwig
2014-12-23 11:46 ` Dongsu Park
2014-12-22 11:48 ` [RFC PATCH 03/17] block: simplify issueing discard, write_same, zeroout Dongsu Park
2014-12-23 10:23 ` Christoph Hellwig
2014-12-22 11:48 ` [RFC PATCH 04/17] bcache: clean up hacks around bio_split_pool Dongsu Park
2014-12-22 11:48 ` [RFC PATCH 05/17] btrfs: remove bio splitting and merge_bvec_fn() calls Dongsu Park
[not found] ` <e4b7b017eaa81784889ebb2a4e6a7d4366adf13a.1419241597.git.dongsu.park@profit bricks.com>
2014-12-23 14:44 ` Chris Mason
2014-12-22 11:48 ` [RFC PATCH 06/17] btrfs: make use of immutable biovecs Dongsu Park
2014-12-23 10:35 ` Christoph Hellwig
2014-12-23 12:09 ` Dongsu Park
2014-12-22 11:48 ` [RFC PATCH 07/17] block: replace sg_iovec with iov_iter Dongsu Park
2014-12-23 10:44 ` Christoph Hellwig
2014-12-23 12:18 ` Dongsu Park
2014-12-27 15:03 ` Christoph Hellwig
2014-12-22 11:48 ` [RFC PATCH 08/17] block: refactor __bio_copy_iov() Dongsu Park
2014-12-23 10:45 ` Christoph Hellwig
2014-12-23 12:24 ` Dongsu Park
2014-12-22 11:48 ` [RFC PATCH 09/17] block: refactor iov_count_pages() from bio_{copy,map}_user_iov() Dongsu Park
2014-12-22 11:48 ` [RFC PATCH 10/17] block: refactor bio_get_user_pages() from __bio_map_user_iov() Dongsu Park
2014-12-22 11:48 ` [RFC PATCH 11/17] block: allow __blk_queue_bounce() to handle bios larger than BIO_MAX_PAGES Dongsu Park
2014-12-22 11:48 ` [RFC PATCH 12/17] md/raid10: make sync_request_write() call bio_copy_data() Dongsu Park
2014-12-23 10:48 ` Christoph Hellwig
2014-12-23 12:31 ` Dongsu Park
2014-12-22 11:48 ` [RFC PATCH 13/17] md/raid5: get rid of bio_fits_rdev() Dongsu Park
2014-12-22 11:48 ` [RFC PATCH 14/17] block: kill merge_bvec_fn() completely Dongsu Park
2014-12-22 11:48 ` [RFC PATCH 15/17] fs: use helper bio_add_page() instead of open coding on bi_io_vec Dongsu Park
2014-12-22 15:22 ` Dave Kleikamp
2014-12-22 11:48 ` [RFC PATCH 16/17] fs: convert buffer head etc. to use immutable biovecs API Dongsu Park
2014-12-23 10:51 ` Christoph Hellwig
2014-12-23 12:33 ` Dongsu Park
2014-12-22 11:48 ` [RFC PATCH 17/17] Documentation: update notes in biovecs about arbitrarily sized bios Dongsu Park
2014-12-23 10:52 ` Christoph Hellwig
2014-12-23 12:34 ` Dongsu Park
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