From: Matthew Wilcox <willy@infradead.org>
To: Chris Mason <clm@fb.com>
Cc: "linux-xfs@vger.kernel.org" <linux-xfs@vger.kernel.org>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"jlayton@kernel.org" <jlayton@kernel.org>,
"hch@infradead.org" <hch@infradead.org>,
Jens Axboe <axboe@kernel.dk>
Subject: Re: [RFC 0/8] Replacing the readpages a_op
Date: Mon, 13 Jan 2020 13:58:11 -0800 [thread overview]
Message-ID: <20200113215811.GA18216@bombadil.infradead.org> (raw)
In-Reply-To: <15C84CC9-3196-441D-94DE-F3FD7AC364F0@fb.com>
On Mon, Jan 13, 2020 at 06:00:52PM +0000, Chris Mason wrote:
> This is true, I didn't explain that part well ;) Depending on
> compression etc we might end up poking the xarray inside the actual IO
> functions, but the main difference is that btrfs is building a single
> bio. You're moving the plug so you'll merge into single bio, but I'd
> rather build 2MB bios than merge them.
Why don't we store a bio pointer inside the plug? You're opencoding that,
iomap is opencoding that, and I bet there's a dozen other places where
we pass a bio around. Then blk_finish_plug can submit the bio.
next prev parent reply other threads:[~2020-01-13 21:58 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-13 15:37 [RFC 0/8] Replacing the readpages a_op Matthew Wilcox
2020-01-13 15:37 ` [PATCH 1/8] pagevec: Add an iterator Matthew Wilcox
2020-01-13 15:37 ` [PATCH 2/8] mm: Fix the return type of __do_page_cache_readahead Matthew Wilcox
2020-01-13 15:37 ` [PATCH 3/8] mm: Use a pagevec for readahead Matthew Wilcox
2020-01-13 15:37 ` [PATCH 4/8] mm/fs: Add a_ops->readahead Matthew Wilcox
2020-01-13 18:22 ` Daniel Wagner
2020-01-13 19:17 ` Matthew Wilcox
2020-01-13 15:37 ` [PATCH 5/8] iomap,xfs: Convert from readpages to readahead Matthew Wilcox
2020-01-13 15:37 ` [PATCH 6/8] cifs: " Matthew Wilcox
2020-01-13 15:37 ` [PATCH 7/8] mm: Remove add_to_page_cache_locked Matthew Wilcox
2020-01-13 15:37 ` [PATCH 8/8] mm: Unify all add_to_page_cache variants Matthew Wilcox
2020-01-13 16:42 ` [RFC 0/8] Replacing the readpages a_op Chris Mason
2020-01-13 17:40 ` Matthew Wilcox
2020-01-13 18:00 ` Chris Mason
2020-01-13 21:58 ` Matthew Wilcox [this message]
2020-01-13 22:00 ` Jens Axboe
2020-01-13 22:10 ` Matthew Wilcox
2020-01-13 22:14 ` Jens Axboe
2020-01-13 22:27 ` Matthew Wilcox
2020-01-13 22:30 ` Jens Axboe
2020-01-13 22:34 ` Chris Mason
2020-01-14 1:01 ` Matthew Wilcox
2020-01-14 1:07 ` Chris Mason
2020-01-13 17:54 ` Matthew Wilcox
2020-01-13 22:19 ` Jens Axboe
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