Re: [PATCH v2 0/8] btrfs: make subpage handling be feature full

[Qu Wenruo <wqu@suse.com>]

在 2025/2/27 21:46, David Sterba 写道:
> On Thu, Feb 27, 2025 at 04:24:38PM +1030, Qu Wenruo wrote:
>> [CHANGLOG]
>> v2:
>> - Add a new bug fix which is exposed by recent 2K block size tests on
>>    x86_64
>>    It's a self deadlock where the folio_end_writeback() is called with
>>    subpage lock hold, and folio_end_writeback() will eventually call
>>    btrfs_release_folio() and try to lock the same spin lock.
>>
>> Since the introduction of btrfs subapge support in v5.15, there are
>> quite some limitations:
>>
>> - No RAID56 support
>>    Added in v5.19.
>>
>> - No memory efficient scrub support
>>    Added in v6.4.
>>
>> - No block perfect compressed write support
>>    Previously btrfs requires the dirty range to be fully page aligned, or
>>    it will skip compression completely.
>>
>>    Added in v6.13.
>>
>> - Various subpage related error handling fixes
>>    Added in v6.14.
>>
>> - No support to create inline data extent
>> - No partial uptodate page support
>>    This is a long existing optimization supported by EXT4/XFS and
>>    is required to pass generic/563 with subpage block size.
>>
>> The last two are addressed in this patchset.
> 
> That's great, thank you very much. I think not all patches have a
> reviewed-by tag but I'd like to get it to for-next very soon.  The next
> is rc5 and we should have all features in. This also means the 2K
> nodesize block so we can give it more testing.

Now pushed to for-next, with all patches reviewed (or acked) by Filipe.

Great thanks to Filipe for the review!

For the 2K one, since it's just two small patches I'm also fine pushing 
them now.
Just do not forget that we need progs patches, and a dozen of known 
failures from fstests, and I'm not yet able to address them all any time 
soon.

Thanks,
Qu