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From: David Sterba <dsterba@suse.cz>
To: Qu Wenruo <quwenruo.btrfs@gmx.com>
Cc: dsterba@suse.cz, Qu Wenruo <wqu@suse.com>, linux-btrfs@vger.kernel.org
Subject: Re: [PATCH v4 00/18] btrfs: add read-only support for subpage sector size
Date: Sun, 24 Jan 2021 13:29:31 +0100	[thread overview]
Message-ID: <20210124122931.GF1993@twin.jikos.cz> (raw)
In-Reply-To: <9193d7a7-500a-044c-5964-593d93aa25b2@gmx.com>

On Tue, Jan 19, 2021 at 07:26:17AM +0800, Qu Wenruo wrote:
> On 2021/1/19 上午7:17, David Sterba wrote:
> > On Sat, Jan 16, 2021 at 03:15:15PM +0800, Qu Wenruo wrote:
> > As the subpage support is
> > sort of an isolated feature we could afford to get the first batch of
> > code in and continue polishing. Read-only suppot with 64k/4k is a good
> > milestone so I'm not worried too much about some smaller things left
> > behind, as long as the default case page size == sectorsize works.
> 
> Yeah, that's the core design of current subpage support, all subpage
> will be handled in a different routine, leaving minimal impact to
> existing code.
> 
> >
> > Tests of this branch are still running but so far so good. I'll add it
> > as a topic branch to for-next for testing and my current plan is to push
> > it to misc-next soon, targeting 5.12.
> 
> That's great to hear.
> >
> >> In the subpage branch
> >> - Metadata read write and balance
> >>    Not yet full tested due to data write still has bugs need to be
> >>    solved.
> >>    But considering that metadata operations from previous iteration
> >>    is mostly untouched, metadata read write should be pretty stable.
> >
> > I assume the bugs are for the 64k/4k usecase.
> 
> Yes, at least the 4K case passes fstests in my local env.

I'd done a pre-merge pass last week with fixups in changlogs, subjects
and some coding style fixes but that was before Josef's comments. Some
of them still need updates but I also don't want to throw away my
changes.  (Ideally I don't have to do them at all, you can get the gist
of what are the most common things I'm fixing by comparing both versions.)

Please have a look at the branch ext/qu/subpage-v4 in my github repo,
the patches are in the same order as in this posted patchset. If the
patch does not change you can keep it as is, I'll reuse what I have.

For the final merge of the read-only support, patch 1 could be dropped
as discussed. The rest is hopefully ok to go, please resend, thanks.

  reply	other threads:[~2021-01-24 12:32 UTC|newest]

Thread overview: 68+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-16  7:15 [PATCH v4 00/18] btrfs: add read-only support for subpage sector size Qu Wenruo
2021-01-16  7:15 ` [PATCH v4 01/18] btrfs: update locked page dirty/writeback/error bits in __process_pages_contig() Qu Wenruo
2021-01-19 21:41   ` Josef Bacik
2021-01-21  6:32     ` Qu Wenruo
2021-01-21  6:51       ` Qu Wenruo
2021-01-23 19:13         ` David Sterba
2021-01-24  0:35           ` Qu Wenruo
2021-01-24 11:49             ` David Sterba
2021-01-16  7:15 ` [PATCH v4 02/18] btrfs: merge PAGE_CLEAR_DIRTY and PAGE_SET_WRITEBACK into PAGE_START_WRITEBACK Qu Wenruo
2021-01-19 21:43   ` Josef Bacik
2021-01-19 21:45   ` Josef Bacik
2021-01-16  7:15 ` [PATCH v4 03/18] btrfs: introduce the skeleton of btrfs_subpage structure Qu Wenruo
2021-01-18 22:46   ` David Sterba
2021-01-18 22:54     ` Qu Wenruo
2021-01-19 15:51       ` David Sterba
2021-01-19 16:06         ` David Sterba
2021-01-20  0:19           ` Qu Wenruo
2021-01-23 19:37             ` David Sterba
2021-01-24  0:24               ` Qu Wenruo
2021-01-18 23:01   ` David Sterba
2021-01-16  7:15 ` [PATCH v4 04/18] btrfs: make attach_extent_buffer_page() to handle subpage case Qu Wenruo
2021-01-18 22:51   ` David Sterba
2021-01-19 21:54   ` Josef Bacik
2021-01-19 22:35     ` David Sterba
2021-01-26  7:29       ` Qu Wenruo
2021-01-27 19:58         ` David Sterba
2021-01-20  0:27     ` Qu Wenruo
2021-01-20 14:22       ` Josef Bacik
2021-01-21  1:20         ` Qu Wenruo
2021-01-16  7:15 ` [PATCH v4 05/18] btrfs: make grab_extent_buffer_from_page() " Qu Wenruo
2021-01-16  7:15 ` [PATCH v4 06/18] btrfs: support subpage for extent buffer page release Qu Wenruo
2021-01-20 14:44   ` Josef Bacik
2021-01-21  0:45     ` Qu Wenruo
2021-01-16  7:15 ` [PATCH v4 07/18] btrfs: attach private to dummy extent buffer pages Qu Wenruo
2021-01-20 14:48   ` Josef Bacik
2021-01-21  0:47     ` Qu Wenruo
2021-01-16  7:15 ` [PATCH v4 08/18] btrfs: introduce helper for subpage uptodate status Qu Wenruo
2021-01-19 19:45   ` David Sterba
2021-01-20 14:55   ` Josef Bacik
2021-01-26  7:21     ` Qu Wenruo
2021-01-20 15:00   ` Josef Bacik
2021-01-21  0:49     ` Qu Wenruo
2021-01-21  1:28       ` Josef Bacik
2021-01-21  1:38         ` Qu Wenruo
2021-01-16  7:15 ` [PATCH v4 09/18] btrfs: introduce helper for subpage error status Qu Wenruo
2021-01-16  7:15 ` [PATCH v4 10/18] btrfs: make set/clear_extent_buffer_uptodate() to support subpage size Qu Wenruo
2021-01-16  7:15 ` [PATCH v4 11/18] btrfs: make btrfs_clone_extent_buffer() to be subpage compatible Qu Wenruo
2021-01-16  7:15 ` [PATCH v4 12/18] btrfs: implement try_release_extent_buffer() for subpage metadata support Qu Wenruo
2021-01-20 15:05   ` Josef Bacik
2021-01-21  0:51     ` Qu Wenruo
2021-01-23 20:36     ` David Sterba
2021-01-25 20:02       ` Josef Bacik
2021-01-16  7:15 ` [PATCH v4 13/18] btrfs: introduce read_extent_buffer_subpage() Qu Wenruo
2021-01-20 15:08   ` Josef Bacik
2021-01-16  7:15 ` [PATCH v4 14/18] btrfs: extent_io: make endio_readpage_update_page_status() to handle subpage case Qu Wenruo
2021-01-16  7:15 ` [PATCH v4 15/18] btrfs: disk-io: introduce subpage metadata validation check Qu Wenruo
2021-01-16  7:15 ` [PATCH v4 16/18] btrfs: introduce btrfs_subpage for data inodes Qu Wenruo
2021-01-19 20:48   ` David Sterba
2021-01-20 15:28   ` Josef Bacik
2021-01-26  7:05     ` Qu Wenruo
2021-01-16  7:15 ` [PATCH v4 17/18] btrfs: integrate page status update for data read path into begin/end_page_read() Qu Wenruo
2021-01-20 15:41   ` Josef Bacik
2021-01-21  1:05     ` Qu Wenruo
2021-01-16  7:15 ` [PATCH v4 18/18] btrfs: allow RO mount of 4K sector size fs on 64K page system Qu Wenruo
2021-01-18 23:17 ` [PATCH v4 00/18] btrfs: add read-only support for subpage sector size David Sterba
2021-01-18 23:26   ` Qu Wenruo
2021-01-24 12:29     ` David Sterba [this message]
2021-01-25  1:19       ` Qu Wenruo

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