From: David Sterba <dsterba@suse.cz>
To: Christoph Hellwig <hch@lst.de>
Cc: Jens Axboe <axboe@kernel.dk>,
dm-devel@redhat.com, linux-xfs@vger.kernel.org,
linux-fsdevel@vger.kernel.org, linux-um@lists.infradead.org,
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Subject: Re: [PATCH 27/27] direct-io: remove random prefetches
Date: Tue, 19 Apr 2022 14:55:17 +0200 [thread overview]
Message-ID: <20220419125517.GB2348@twin.jikos.cz> (raw)
In-Reply-To: <20220415045258.199825-28-hch@lst.de>
On Fri, Apr 15, 2022 at 06:52:58AM +0200, Christoph Hellwig wrote:
> Randomly poking into block device internals for manual prefetches isn't
> exactly a very maintainable thing to do. And none of the performance
> criticil direct I/O implementations still use this library function
> anyway, so just drop it.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
That the direct io function needed a valid bdev just for the prefetch
but nothing else was one of the reasons we had to keep the latest_bdev
in btrfs, so good riddance.
You may want to add the reference to the patch that added the prefetch,
65dd2aa90aa1 ("dio: optimize cache misses in the submission path") and
also remove #include <linux/prefetch.h> as there are no more uses of
prefetch in the file.
With that
Reviewed-by: David Sterba <dsterba@suse.com>
next prev parent reply other threads:[~2022-04-19 12:59 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-15 4:52 use block_device based APIs in block layer consumers v3 Christoph Hellwig
2022-04-15 4:52 ` [PATCH 01/27] target: remove an incorrect unmap zeroes data deduction Christoph Hellwig
2022-04-15 5:36 ` Chaitanya Kulkarni
2022-04-15 4:52 ` [PATCH 02/27] target: pass a block_device to target_configure_unmap_from_queue Christoph Hellwig
2022-04-15 5:38 ` Chaitanya Kulkarni
2022-04-15 4:52 ` [PATCH 03/27] target: fix discard alignment on partitions Christoph Hellwig
2022-04-15 5:39 ` Chaitanya Kulkarni
2022-04-15 4:52 ` [PATCH 04/27] drbd: remove assign_p_sizes_qlim Christoph Hellwig
2022-04-15 4:52 ` [PATCH 05/27] drbd: use bdev based limit helpers in drbd_send_sizes Christoph Hellwig
2022-04-15 4:52 ` [PATCH 06/27] drbd: use bdev_alignment_offset instead of queue_alignment_offset Christoph Hellwig
2022-04-15 4:52 ` [PATCH 07/27] drbd: cleanup decide_on_discard_support Christoph Hellwig
2022-04-15 4:52 ` [PATCH 08/27] btrfs: use bdev_max_active_zones instead of open coding it Christoph Hellwig
2022-04-15 5:40 ` Chaitanya Kulkarni
2022-04-19 12:02 ` Anand Jain
2022-04-15 4:52 ` [PATCH 09/27] ntfs3: use bdev_logical_block_size " Christoph Hellwig
2022-04-15 4:52 ` [PATCH 10/27] mm: use bdev_is_zoned in claim_swapfile Christoph Hellwig
2022-04-15 5:09 ` Damien Le Moal
2022-04-15 5:40 ` Chaitanya Kulkarni
2022-04-15 4:52 ` [PATCH 11/27] block: add a bdev_nonrot helper Christoph Hellwig
2022-04-15 5:41 ` Chaitanya Kulkarni
2022-04-15 4:52 ` [PATCH 12/27] block: add a bdev_write_cache helper Christoph Hellwig
2022-04-15 5:41 ` Chaitanya Kulkarni
2022-04-15 4:52 ` [PATCH 13/27] block: add a bdev_fua helper Christoph Hellwig
2022-04-15 5:42 ` Chaitanya Kulkarni
2022-04-15 4:52 ` [PATCH 14/27] block: add a bdev_stable_writes helper Christoph Hellwig
2022-04-15 5:42 ` Chaitanya Kulkarni
2022-04-15 4:52 ` [PATCH 15/27] block: add a bdev_max_zone_append_sectors helper Christoph Hellwig
2022-04-15 5:43 ` Chaitanya Kulkarni
2022-04-15 4:52 ` [PATCH 16/27] block: use bdev_alignment_offset in part_alignment_offset_show Christoph Hellwig
2022-04-15 5:43 ` Chaitanya Kulkarni
2022-04-15 4:52 ` [PATCH 17/27] block: use bdev_alignment_offset in disk_alignment_offset_show Christoph Hellwig
2022-04-15 4:52 ` [PATCH 18/27] block: move bdev_alignment_offset and queue_limit_alignment_offset out of line Christoph Hellwig
2022-04-15 4:52 ` [PATCH 19/27] block: remove queue_discard_alignment Christoph Hellwig
2022-04-15 4:52 ` [PATCH 20/27] block: use bdev_discard_alignment in part_discard_alignment_show Christoph Hellwig
2022-04-15 4:52 ` [PATCH 21/27] block: move {bdev,queue_limit}_discard_alignment out of line Christoph Hellwig
2022-04-15 4:52 ` [PATCH 22/27] block: refactor discard bio size limiting Christoph Hellwig
2022-04-15 5:46 ` Chaitanya Kulkarni
2022-04-15 4:52 ` [PATCH 23/27] block: add a bdev_max_discard_sectors helper Christoph Hellwig
2022-04-15 5:47 ` Chaitanya Kulkarni
2022-04-15 4:52 ` [PATCH 24/27] block: remove QUEUE_FLAG_DISCARD Christoph Hellwig
2022-04-15 5:47 ` Chaitanya Kulkarni
2022-04-15 4:52 ` [PATCH 25/27] block: add a bdev_discard_granularity helper Christoph Hellwig
2022-04-15 4:52 ` [PATCH 26/27] block: decouple REQ_OP_SECURE_ERASE from REQ_OP_DISCARD Christoph Hellwig
2022-04-15 5:51 ` Chaitanya Kulkarni
2022-04-16 2:28 ` [f2fs-dev] " Chao Yu
2022-04-15 4:52 ` [PATCH 27/27] direct-io: remove random prefetches Christoph Hellwig
2022-04-15 5:08 ` Damien Le Moal
2022-04-19 12:55 ` David Sterba [this message]
2022-04-18 12:52 ` use block_device based APIs in block layer consumers v3 Jens Axboe
-- strict thread matches above, loose matches on Subject: below --
2022-04-09 4:50 use block_device based APIs in block layer consumers v2 Christoph Hellwig
2022-04-09 4:50 ` [PATCH 27/27] direct-io: remove random prefetches Christoph Hellwig
2022-04-06 6:04 use block_device based APIs in block layer consumers Christoph Hellwig
2022-04-06 6:05 ` [PATCH 27/27] direct-io: remove random prefetches Christoph Hellwig
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