From: Hannes Reinecke <hare@suse.de>
To: Matthew Wilcox <willy@infradead.org>
Cc: linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Christoph Hellwig <hch@lst.de>,
Luis Chamberlain <mcgrof@kernel.org>,
Hannes Reinecke <hare@suse.de>
Subject: [PATCH 0/7] RFC: high-order folio support for I/O
Date: Wed, 14 Jun 2023 13:46:30 +0200 [thread overview]
Message-ID: <20230614114637.89759-1-hare@suse.de> (raw)
Hi all,
now, that was easy.
Thanks to willy and his recent patchset to support large folios in
gfs2 turns out that most of the work to support high-order folios
for I/O is actually done.
It only need twe rather obvious patches to allocate folios with
the order derived from the mapping blocksize, and to adjust readahead
to avoid reading off the end of the device.
But with these two patches (and the patchset from hch to switch
the block device over to iomap) (and the patchset from ritesh to
support sub-blocksize iomap buffers) I can now do:
# modprobe brd rd_size=524288 rd_blksize=16384
# mkfs.xfs -b size=16384 /dev/ram0
it still fails when trying to mount the device:
XFS (ram0): Cannot set_blocksize to 16384 on device ram0
but to my understanding this is being worked on.
Christoph, any chance to have an updated submission of your
patchset to convert block devices over to iomap?
I don't actually need the last one to switch off buffer heads,
but the others really do help for this case.
The entire tree can be found at:
git.kernel.org:/pub/scm/linux/git/kernel/hare/scsi-devel.git
branch brd.v2
Happy hacking!
Hannes Reinecke (6):
brd: convert to folios
brd: abstract page_size conventions
brd: make sector size configurable
brd: make logical sector size configurable
mm/filemap: allocate folios with mapping blocksize
mm/readahead: align readahead down to mapping blocksize
Pankaj Raghav (1):
brd: use XArray instead of radix-tree to index backing pages
drivers/block/brd.c | 320 +++++++++++++++++++++-------------------
include/linux/pagemap.h | 7 +
mm/filemap.c | 7 +-
mm/readahead.c | 10 +-
4 files changed, 186 insertions(+), 158 deletions(-)
--
2.35.3
next reply other threads:[~2023-06-14 11:47 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-14 11:46 Hannes Reinecke [this message]
2023-06-14 11:46 ` [PATCH 1/7] brd: use XArray instead of radix-tree to index backing pages Hannes Reinecke
2023-06-14 12:45 ` Matthew Wilcox
2023-06-14 12:50 ` Pankaj Raghav
2023-06-14 13:03 ` Hannes Reinecke
2023-06-14 11:46 ` [PATCH 2/7] brd: convert to folios Hannes Reinecke
2023-06-14 13:45 ` Matthew Wilcox
2023-06-14 13:50 ` Hannes Reinecke
2023-06-14 11:46 ` [PATCH 3/7] brd: abstract page_size conventions Hannes Reinecke
2023-06-14 11:46 ` [PATCH 4/7] brd: make sector size configurable Hannes Reinecke
2023-06-14 12:55 ` Matthew Wilcox
2023-06-14 13:02 ` Hannes Reinecke
2023-06-15 2:17 ` Dave Chinner
2023-06-15 5:55 ` Christoph Hellwig
2023-06-15 6:33 ` Hannes Reinecke
2023-06-15 6:23 ` Hannes Reinecke
2023-06-14 11:46 ` [PATCH 5/7] brd: make logical " Hannes Reinecke
2023-06-14 11:46 ` [PATCH 6/7] mm/filemap: allocate folios with mapping blocksize Hannes Reinecke
[not found] ` <CGME20230619080901eucas1p224e67aa31866d2ad8d259b2209c2db67@eucas1p2.samsung.com>
2023-06-19 8:08 ` Pankaj Raghav
2023-06-19 8:42 ` Hannes Reinecke
2023-06-19 22:57 ` Dave Chinner
2023-06-20 0:00 ` Matthew Wilcox
2023-06-20 5:57 ` Hannes Reinecke
2023-06-14 11:46 ` [PATCH 7/7] mm/readahead: align readahead down to " Hannes Reinecke
2023-06-14 13:17 ` [PATCH 0/7] RFC: high-order folio support for I/O Hannes Reinecke
2023-06-14 13:53 ` Matthew Wilcox
2023-06-14 15:06 ` Hannes Reinecke
2023-06-14 15:35 ` Hannes Reinecke
2023-06-14 17:46 ` Matthew Wilcox
2023-06-14 23:53 ` Dave Chinner
2023-06-15 6:21 ` Hannes Reinecke
2023-06-15 8:51 ` Dave Chinner
2023-06-16 16:06 ` Kent Overstreet
2023-06-15 3:44 ` Dave Chinner
2023-06-14 13:48 ` [PATCH 1/2] highmem: Add memcpy_to_folio() Matthew Wilcox (Oracle)
2023-06-14 18:38 ` kernel test robot
2023-06-14 19:30 ` kernel test robot
2023-06-15 5:58 ` Christoph Hellwig
2023-06-15 12:16 ` Matthew Wilcox
2023-06-14 13:48 ` [PATCH 2/2] highmem: Add memcpy_from_folio() Matthew Wilcox (Oracle)
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