From: Christoph Hellwig <hch@infradead.org>
To: Pavel Begunkov <asml.silence@gmail.com>
Cc: Jens Axboe <axboe@kernel.dk>,
linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/6] block: inline BDEV_I and friends
Date: Mon, 11 Oct 2021 09:20:38 +0100 [thread overview]
Message-ID: <YWPz1io+ePaNSYt5@infradead.org> (raw)
In-Reply-To: <7c112aa98c9268d3d488cbee8b2832dc707812f6.1633781740.git.asml.silence@gmail.com>
On Sat, Oct 09, 2021 at 01:25:39PM +0100, Pavel Begunkov wrote:
> I_BDEV and BDEV_I are very simple, they worth a single arith instruction
> or can even be almost completely compiled out. Inline them.
I see the benefit, but this is moving in the wrong direction.
struct bdev_inode is private to hide the struct inode. Which at
the momen is a bit pointless given the bd_inode pointer in struct
block_device.
So we have two choices here that make sense:
1) remove struct bdev_inode and kill the illusion that the inode
is a private implementation detail
2) remove direct references to bd_inode entirely. Most of them are
to i_size which already has proper helpers that should be used,
and the rest can probably be covered with a handful wrappes or
is bogus anyway
next prev parent reply other threads:[~2021-10-11 8:23 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-09 12:25 [PATCH 0/6] some block optimisations Pavel Begunkov
2021-10-09 12:25 ` [PATCH 1/6] block: cache bdev in struct file for raw bdev IO Pavel Begunkov
2021-10-09 16:33 ` Jens Axboe
2021-10-11 8:26 ` Christoph Hellwig
2021-10-13 8:45 ` Pavel Begunkov
2021-10-09 12:25 ` [PATCH 2/6] block: inline BDEV_I and friends Pavel Begunkov
2021-10-11 8:20 ` Christoph Hellwig [this message]
2021-10-09 12:25 ` [PATCH 3/6] blk-mq: optimise *end_request non-stat path Pavel Begunkov
2021-10-09 12:25 ` [PATCH 4/6] block: inline hot paths of blk_account_io_*() Pavel Begunkov
2021-10-09 12:25 ` [PATCH 5/6] blk-mq: inline hot part of __blk_mq_sched_restart Pavel Begunkov
2021-10-09 12:25 ` [PATCH 6/6] block: convert ->bd_inode to container_of() Pavel Begunkov
2021-10-11 8:32 ` Christoph Hellwig
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