From: Christoph Hellwig <hch@infradead.org>
To: Qu Wenruo <wqu@suse.com>
Cc: linux-btrfs@vger.kernel.org, David Sterba <dsterba@suse.com>
Subject: Re: [PATCH v5 03/13] btrfs: introduce a new helper to submit read bio for scrub
Date: Mon, 27 Mar 2023 16:35:28 -0700 [thread overview]
Message-ID: <ZCIoQLysbLrQW0pX@infradead.org> (raw)
In-Reply-To: <79a6604bc9ccb2a6e1355f9d897b45943c6bcca9.1679959770.git.wqu@suse.com>
On Tue, Mar 28, 2023 at 07:30:53AM +0800, Qu Wenruo wrote:
> The new helper, btrfs_submit_scrub_read(), would be mostly a subset of
> btrfs_submit_bio(), with the following limitations:
>
> - Only supports read
> - @mirror_num must be > 0
> - No read-time repair nor checksum verification
> - The @bbio must not cross stripe boundary
>
> This would provide the basis for unified read repair for scrub, as we no
> longer needs to handle RAID56 recovery all by scrub, and RAID56 data
> stripes scrub can share the same code of read and repair.
>
> The repair part would be the same as non-RAID56, as we only need to try
> the next mirror.
Stupid question: what do we actually still need this and the write helper
for now that I think the generic helpers should work just fine without
bbio->inode?
next prev parent reply other threads:[~2023-03-27 23:35 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-27 23:30 [PATCH v5 00/13] btrfs: scrub: use a more reader friendly code to implement scrub_simple_mirror() Qu Wenruo
2023-03-27 23:30 ` [PATCH v5 01/13] btrfs: scrub: use dedicated super block verification function to scrub one super block Qu Wenruo
2023-03-27 23:30 ` [PATCH v5 02/13] btrfs: introduce a new allocator for scrub specific btrfs_bio Qu Wenruo
2023-03-27 23:30 ` [PATCH v5 03/13] btrfs: introduce a new helper to submit read bio for scrub Qu Wenruo
2023-03-27 23:35 ` Christoph Hellwig [this message]
2023-03-28 0:16 ` Qu Wenruo
2023-03-28 0:25 ` Christoph Hellwig
2023-03-28 0:48 ` Qu Wenruo
2023-03-28 0:53 ` Christoph Hellwig
2023-03-28 1:01 ` Qu Wenruo
2023-03-28 1:04 ` Christoph Hellwig
2023-03-28 1:10 ` Qu Wenruo
2023-03-27 23:30 ` [PATCH v5 04/13] btrfs: introduce a new helper to submit write " Qu Wenruo
2023-03-27 23:30 ` [PATCH v5 05/13] btrfs: scrub: introduce the structure for new BTRFS_STRIPE_LEN based interface Qu Wenruo
2023-03-27 23:30 ` [PATCH v5 06/13] btrfs: scrub: introduce a helper to find and fill the sector info for a scrub_stripe Qu Wenruo
2023-03-27 23:30 ` [PATCH v5 07/13] btrfs: scrub: introduce a helper to verify one metadata Qu Wenruo
2023-03-27 23:30 ` [PATCH v5 08/13] btrfs: scrub: introduce a helper to verify one scrub_stripe Qu Wenruo
2023-03-27 23:30 ` [PATCH v5 09/13] btrfs: scrub: introduce the main read repair worker for scrub_stripe Qu Wenruo
2023-03-27 23:31 ` [PATCH v5 10/13] btrfs: scrub: introduce a writeback helper " Qu Wenruo
2023-03-27 23:31 ` [PATCH v5 11/13] btrfs: scrub: introduce error reporting functionality " Qu Wenruo
2023-03-27 23:31 ` [PATCH v5 12/13] btrfs: scrub: introduce the helper to queue a stripe for scrub Qu Wenruo
2023-03-27 23:31 ` [PATCH v5 13/13] btrfs: scrub: switch scrub_simple_mirror() to scrub_stripe infrastructure Qu Wenruo
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