From: Kent Overstreet <kmo@daterainc.com>
To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-btrfs@vger.kernel.org
Cc: axboe@kernel.dk, hch@infradead.org
Subject: [PATCH] Block layer stuff/DIO rewrite prep for 3.14
Date: Mon, 4 Nov 2013 15:36:18 -0800 [thread overview]
Message-ID: <1383608187-27368-1-git-send-email-kmo@daterainc.com> (raw)
Now that immutable biovecs is in, these are the remaining patches required for
my DIO rewrite, along with some related cleanup/refactoring.
The key enabler is patch 4 - making generic_make_request() handle arbitary sized
bios. This takes what was once bio_add_page()'s responsibility and pushes it
down; long term plan is to hopefully push this down to the driver level, which
should simplify a lot of code (a lot of it very fragile code!) and improve
performance at the same time.
The DIO rewrite needs some more work before it'll be ready, but I wanted to get
this patch series out because this stuff should all be ready and it's useful for
other reasons - I think this stuff will make it a lot easier for the btrfs
people to do what they need with their DIO code.
Other stuff enabled by this:
* With this and the bio_split() rewrite already in, we can just delete
merge_bvec_fn. I have patches for this, but they'll need more testing.
* Multipage bvecs - bvecs pointing to an arbitrary amount of contiguous
physical memory. I have this working but it'll need more testing and code
auditing - this is what lets us kill bi_seg_front_size and bi_seg_back_size
though.
Patch series is based on Jens' for-next tree, and it's available in my git
repository - git://evilpiepirate.org/~kent/linux-bcache.git for-jens
next reply other threads:[~2013-11-04 23:36 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-04 23:36 Kent Overstreet [this message]
2013-11-04 23:36 ` [PATCH 1/9] block: Convert various code to bio_for_each_segment() Kent Overstreet
2013-11-05 13:53 ` Josef Bacik
2013-11-07 11:26 ` Jan Kara
2013-11-07 20:21 ` Kent Overstreet
2013-11-04 23:36 ` [PATCH 2/9] block: submit_bio_wait() conversions Kent Overstreet
2013-11-04 23:36 ` [PATCH 3/9] block: Move bouncing to generic_make_request() Kent Overstreet
2013-11-04 23:36 ` [PATCH 4/9] block: Make generic_make_request handle arbitrary sized bios Kent Overstreet
2013-11-04 23:56 ` [dm-devel] " Mike Christie
2013-11-05 0:55 ` Kent Overstreet
2013-11-04 23:36 ` [PATCH 5/9] block: Gut bio_add_page(), kill bio_add_pc_page() Kent Overstreet
2013-11-04 23:36 ` [PATCH 6/9] mtip32xx: handle arbitrary size bios Kent Overstreet
2013-11-05 13:49 ` Josef Bacik
2013-11-04 23:36 ` [PATCH 7/9] blk-lib.c: generic_make_request() handles large bios now Kent Overstreet
2013-11-04 23:36 ` [PATCH 8/9] bcache: " Kent Overstreet
2013-11-04 23:36 ` [PATCH 9/9] block: Add bio_get_user_pages() Kent Overstreet
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