Re: [PATCH 12/14] block: align blkdev_dio inlined bio to a cacheline

[PATCHSET 0/14] Various block layer optimizations · Jens Axboe <axboe@kernel.dk> · 2021-10-17
[PATCH 01/14] block: inline fast path of driver tag allocation · Jens Axboe <axboe@kernel.dk> · 2021-10-17
Re: [PATCH 01/14] block: inline fast path of driver tag allocation · Christoph Hellwig <hch@infradead.org> · 2021-10-18
Re: [PATCH 01/14] block: inline fast path of driver tag allocation · Jens Axboe <axboe@kernel.dk> · 2021-10-18
[PATCH 02/14] block: don't bother iter advancing a fully done bio · Jens Axboe <axboe@kernel.dk> · 2021-10-17
Re: [PATCH 02/14] block: don't bother iter advancing a fully done bio · Christoph Hellwig <hch@infradead.org> · 2021-10-18
[PATCH 03/14] block: remove useless caller argument to print_req_error() · Jens Axboe <axboe@kernel.dk> · 2021-10-17
Re: [PATCH 03/14] block: remove useless caller argument to print_req_error() · Christoph Hellwig <hch@infradead.org> · 2021-10-18
[PATCH 04/14] block: move update request helpers into blk-mq.c · Jens Axboe <axboe@kernel.dk> · 2021-10-17
Re: [PATCH 04/14] block: move update request helpers into blk-mq.c · Christoph Hellwig <hch@infradead.org> · 2021-10-18
[PATCH 05/14] block: don't call blk_status_to_errno() for success status · Jens Axboe <axboe@kernel.dk> · 2021-10-17
Re: [PATCH 05/14] block: don't call blk_status_to_errno() for success status · Christoph Hellwig <hch@infradead.org> · 2021-10-18
Re: [PATCH 05/14] block: don't call blk_status_to_errno() for success status · Pavel Begunkov <asml.silence@gmail.com> · 2021-10-18
[PATCH 06/14] block: store elevator state in request · Jens Axboe <axboe@kernel.dk> · 2021-10-17
Re: [PATCH 06/14] block: store elevator state in request · Christoph Hellwig <hch@infradead.org> · 2021-10-18
Re: [PATCH 06/14] block: store elevator state in request · Jens Axboe <axboe@kernel.dk> · 2021-10-18
Re: [PATCH 06/14] block: store elevator state in request · Guillaume Tucker <hidden> · 2021-10-19
Re: [PATCH 06/14] block: store elevator state in request · Jens Axboe <axboe@kernel.dk> · 2021-10-19
[PATCH 07/14] block: change plugging to use a singly linked list · Jens Axboe <axboe@kernel.dk> · 2021-10-17
Re: [PATCH 07/14] block: change plugging to use a singly linked list · Christoph Hellwig <hch@infradead.org> · 2021-10-18
Re: [PATCH 07/14] block: change plugging to use a singly linked list · Jens Axboe <axboe@kernel.dk> · 2021-10-18
Re: [PATCH 07/14] block: change plugging to use a singly linked list · Pavel Begunkov <asml.silence@gmail.com> · 2021-10-18
Re: [PATCH 07/14] block: change plugging to use a singly linked list · Jens Axboe <axboe@kernel.dk> · 2021-10-18
[PATCH 08/14] block: improve layout of struct request · Jens Axboe <axboe@kernel.dk> · 2021-10-17
Re: [PATCH 08/14] block: improve layout of struct request · Christoph Hellwig <hch@infradead.org> · 2021-10-18
[PATCH 09/14] block: only mark bio as tracked if it really is tracked · Jens Axboe <axboe@kernel.dk> · 2021-10-17
Re: [PATCH 09/14] block: only mark bio as tracked if it really is tracked · Christoph Hellwig <hch@infradead.org> · 2021-10-18
[PATCH 10/14] block: move blk_mq_tag_to_rq() inline · Jens Axboe <axboe@kernel.dk> · 2021-10-17
[PATCH 11/14] block: optimize blk_mq_rq_ctx_init() · Jens Axboe <axboe@kernel.dk> · 2021-10-17
Re: [PATCH 11/14] block: optimize blk_mq_rq_ctx_init() · Christoph Hellwig <hch@infradead.org> · 2021-10-18
[PATCH 12/14] block: align blkdev_dio inlined bio to a cacheline · Jens Axboe <axboe@kernel.dk> · 2021-10-17
Re: [PATCH 12/14] block: align blkdev_dio inlined bio to a cacheline · Christoph Hellwig <hch@infradead.org> · 2021-10-18
Re: [PATCH 12/14] block: align blkdev_dio inlined bio to a cacheline · Jens Axboe <axboe@kernel.dk> · 2021-10-18
[PATCH 13/14] block: remove debugfs blk_mq_ctx dispatched/merged/completed attributes · Jens Axboe <axboe@kernel.dk> · 2021-10-17
Re: [PATCH 13/14] block: remove debugfs blk_mq_ctx dispatched/merged/completed attributes · Christoph Hellwig <hch@infradead.org> · 2021-10-18
[PATCH 14/14] block: remove some blk_mq_hw_ctx debugfs entries · Jens Axboe <axboe@kernel.dk> · 2021-10-17
Re: [PATCH 14/14] block: remove some blk_mq_hw_ctx debugfs entries · Christoph Hellwig <hch@infradead.org> · 2021-10-18

From: Christoph Hellwig <hch@infradead.org>
Date: 2021-10-18 09:21:36

On Sat, Oct 16, 2021 at 07:37:46PM -0600, Jens Axboe wrote:

We get all sorts of unreliable and funky results since the bio is
designed to align on a cacheline, which it does not when inlined like
this.

Well, I guess you'll need to audit all the front_pad users for
something like this then?

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