From: "Darrick J. Wong" <djwong@kernel.org>
To: Ritesh Harjani <ritesh.list@gmail.com>
Cc: "Pankaj Raghav (Samsung)" <kernel@pankajraghav.com>,
willy@infradead.org, brauner@kernel.org, david@fromorbit.com,
chandan.babu@oracle.com, akpm@linux-foundation.org,
linux-fsdevel@vger.kernel.org, hare@suse.de,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-xfs@vger.kernel.org, mcgrof@kernel.org,
gost.dev@samsung.com, p.raghav@samsung.com
Subject: Re: [PATCH v4 00/11] enable bs > ps in XFS
Date: Fri, 26 Apr 2024 22:05:17 -0700 [thread overview]
Message-ID: <20240427050517.GC360898@frogsfrogsfrogs> (raw)
In-Reply-To: <87y18zxvpd.fsf@gmail.com>
On Sat, Apr 27, 2024 at 10:12:38AM +0530, Ritesh Harjani wrote:
> "Pankaj Raghav (Samsung)" <kernel@pankajraghav.com> writes:
>
> > From: Pankaj Raghav <p.raghav@samsung.com>
> >
> > This is the fourth version of the series that enables block size > page size
> > (Large Block Size) in XFS. The context and motivation can be seen in cover
> > letter of the RFC v1[1]. We also recorded a talk about this effort at LPC [3],
> > if someone would like more context on this effort.
> >
> > This series does not split a folio during truncation even though we have
> > an API to do so due to some issues with writeback. While it is not a
> > blocker, this feature can be added as a future improvement once we
> > get the base patches upstream (See patch 7).
> >
> > A lot of emphasis has been put on testing using kdevops. The testing has
> > been split into regression and progression.
> >
> > Regression testing:
> > In regression testing, we ran the whole test suite to check for
> > *regression on existing profiles due to the page cache changes.
> >
> > No regression was found with the patches added on top.
> >
> > Progression testing:
> > For progression testing, we tested for 8k, 16k, 32k and 64k block sizes.
> > To compare it with existing support, an ARM VM with 64k base page system
> > (without our patches) was used as a reference to check for actual failures
> > due to LBS support in a 4k base page size system.
> >
> > There are some tests that assumes block size < page size that needs to
> > be fixed. I have a tree with fixes for xfstests here [6], which I will be
> > sending soon to the list. Already a part of this has been upstreamed to
> > fstest.
> >
> > No new failures were found with the LBS support.
>
> I just did portability testing by creating XFS with 16k bs on x86 VM (4k
> pagesize), created some files + checksums. I then moved the disk to
> Power VM with 64k pagesize and mounted this. I was able to mount and
> all the file checksums passed.
>
> Then I did the vice versa, created a filesystem on Power VM with 64k
> blocksize and created 10 files with random data of 10MB each. I then
> hotplugged this device out from Power and plugged it into x86 VM and
> mounted it.
>
> <Logs of the 2nd operation>
> ~# mount /dev/vdk /mnt1/
> [ 35.145350] XFS (vdk): EXPERIMENTAL: Filesystem with Large Block Size (65536 bytes) enabled.
> [ 35.149858] XFS (vdk): Mounting V5 Filesystem 91933a8b-1370-4931-97d1-c21213f31f8f
> [ 35.227459] XFS (vdk): Ending clean mount
> [ 35.235090] xfs filesystem being mounted at /mnt1 supports timestamps until 2038-01-19 (0x7fffffff)
> ~# cd /mnt1/
> ~# sha256sum -c checksums
> file-1.img: OK
> file-2.img: OK
> file-3.img: OK
> file-4.img: OK
> file-5.img: OK
> file-6.img: OK
> file-7.img: OK
> file-8.img: OK
> file-9.img: OK
> file-10.img: OK
>
> So thanks for this nice portability which this series offers :)
Yessss this is awesome to see this coming together after many years!
--D
> -ritesh
>
>
next prev parent reply other threads:[~2024-04-27 5:05 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-25 11:37 [PATCH v4 00/11] enable bs > ps in XFS Pankaj Raghav (Samsung)
2024-04-25 11:37 ` [PATCH v4 01/11] readahead: rework loop in page_cache_ra_unbounded() Pankaj Raghav (Samsung)
2024-04-25 11:37 ` [PATCH v4 02/11] fs: Allow fine-grained control of folio sizes Pankaj Raghav (Samsung)
2024-04-25 18:07 ` Hannes Reinecke
2024-04-26 15:09 ` Darrick J. Wong
2024-04-25 11:37 ` [PATCH v4 03/11] filemap: allocate mapping_min_order folios in the page cache Pankaj Raghav (Samsung)
2024-04-25 19:04 ` Hannes Reinecke
2024-04-26 15:12 ` Darrick J. Wong
2024-04-28 20:59 ` Pankaj Raghav (Samsung)
2024-04-25 11:37 ` [PATCH v4 04/11] readahead: allocate folios with mapping_min_order in readahead Pankaj Raghav (Samsung)
2024-04-25 18:53 ` Matthew Wilcox
2024-04-25 11:37 ` [PATCH v4 05/11] mm: do not split a folio if it has minimum folio order requirement Pankaj Raghav (Samsung)
2024-04-25 20:10 ` Matthew Wilcox
2024-04-26 0:47 ` Luis Chamberlain
2024-04-26 23:46 ` Luis Chamberlain
2024-04-28 0:57 ` Luis Chamberlain
2024-04-29 3:56 ` Luis Chamberlain
2024-04-29 14:29 ` Zi Yan
2024-04-30 0:31 ` Luis Chamberlain
2024-04-30 0:49 ` Luis Chamberlain
2024-04-30 2:43 ` Zi Yan
2024-04-30 19:27 ` Luis Chamberlain
2024-05-01 4:13 ` Matthew Wilcox
2024-05-01 14:28 ` Matthew Wilcox
2024-04-26 15:49 ` Pankaj Raghav (Samsung)
2024-04-25 11:37 ` [PATCH v4 06/11] filemap: cap PTE range to be created to i_size in folio_map_range() Pankaj Raghav (Samsung)
2024-04-25 20:24 ` Matthew Wilcox
2024-04-26 12:54 ` Pankaj Raghav (Samsung)
2024-04-25 11:37 ` [PATCH v4 07/11] iomap: fix iomap_dio_zero() for fs bs > system page size Pankaj Raghav (Samsung)
2024-04-26 6:22 ` Christoph Hellwig
2024-04-26 11:43 ` Pankaj Raghav (Samsung)
2024-04-27 5:12 ` Christoph Hellwig
2024-04-29 21:02 ` Pankaj Raghav (Samsung)
2024-04-27 3:26 ` Matthew Wilcox
2024-04-27 4:52 ` Christoph Hellwig
2024-04-25 11:37 ` [PATCH v4 08/11] xfs: use kvmalloc for xattr buffers Pankaj Raghav (Samsung)
2024-04-26 15:18 ` Darrick J. Wong
2024-04-28 21:06 ` Pankaj Raghav (Samsung)
2024-04-25 11:37 ` [PATCH v4 09/11] xfs: expose block size in stat Pankaj Raghav (Samsung)
2024-04-26 15:15 ` Darrick J. Wong
2024-04-25 11:37 ` [PATCH v4 10/11] xfs: make the calculation generic in xfs_sb_validate_fsb_count() Pankaj Raghav (Samsung)
2024-04-26 15:16 ` Darrick J. Wong
2024-04-25 11:37 ` [PATCH v4 11/11] xfs: enable block size larger than page size support Pankaj Raghav (Samsung)
2024-04-26 15:18 ` Darrick J. Wong
2024-04-27 4:42 ` [PATCH v4 00/11] enable bs > ps in XFS Ritesh Harjani
2024-04-27 5:05 ` Darrick J. Wong [this message]
2024-04-29 20:39 ` Pankaj Raghav (Samsung)
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