From: Matthew Wilcox <willy@infradead.org>
To: Luis Chamberlain <mcgrof@kernel.org>
Cc: hughd@google.com, akpm@linux-foundation.org, brauner@kernel.org,
djwong@kernel.org, p.raghav@samsung.com, da.gomez@samsung.com,
rohan.puri@samsung.com, rpuri.linux@gmail.com,
a.manzanares@samsung.com, dave@stgolabs.net,
yosryahmed@google.com, keescook@chromium.org, hare@suse.de,
kbusch@kernel.org, patches@lists.linux.dev,
linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC v2 0/8] add support for blocksize > PAGE_SIZE
Date: Fri, 26 May 2023 19:43:26 +0100 [thread overview]
Message-ID: <ZHD9zmIeNXICDaRJ@casper.infradead.org> (raw)
In-Reply-To: <ZHDtgdhauy0RZPeU@bombadil.infradead.org>
On Fri, May 26, 2023 at 10:33:53AM -0700, Luis Chamberlain wrote:
> On Fri, May 26, 2023 at 02:54:12PM +0100, Matthew Wilcox wrote:
> > You're coming at this from a block layer perspective, and we have two
> > ways of doing large block devices -- qemu nvme and brd. tmpfs should
> > be like other filesystems and opportunistically use folios of whatever
> > size makes sense.
>
> I figured the backing block size would be a good reason to use high
> order folios for filesystems, and this mimicks that through the super
> block block size. Although usage of the block size would be moved to
> the block device and tmpfs use an page order, what other alternatives
> were you thinking?
Use the readahead code like other filesystems to determine what size of
folios to allocate. Also use the size of writes to determine what size
of folio to allocate, as in this patchset:
https://lore.kernel.org/linux-fsdevel/20230520163603.1794256-1-willy@infradead.org/
prev parent reply other threads:[~2023-05-26 18:43 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-26 7:55 [RFC v2 0/8] add support for blocksize > PAGE_SIZE Luis Chamberlain
2023-05-26 7:55 ` [RFC v2 1/8] page_flags: add is_folio_hwpoison() Luis Chamberlain
2023-05-26 13:51 ` Matthew Wilcox
2023-05-26 15:40 ` Keith Busch
2023-05-26 7:55 ` [RFC v2 2/8] shmem: convert to use is_folio_hwpoison() Luis Chamberlain
2023-05-26 14:32 ` Matthew Wilcox
2023-05-26 17:41 ` Luis Chamberlain
2023-05-26 18:41 ` Matthew Wilcox
2023-05-26 7:55 ` [RFC v2 3/8] shmem: account for high order folios Luis Chamberlain
2023-05-26 7:55 ` [RFC v2 4/8] shmem: add helpers to get block size Luis Chamberlain
2023-05-26 7:55 ` [RFC v2 5/8] shmem: account for larger blocks sizes for shmem_default_max_blocks() Luis Chamberlain
2023-05-26 7:55 ` [RFC v2 6/8] shmem: consider block size in shmem_default_max_inodes() Luis Chamberlain
2023-05-26 7:55 ` [RFC v2 7/8] shmem: add high order page support Luis Chamberlain
2023-05-26 7:55 ` [RFC v2 8/8] shmem: add support to customize block size order Luis Chamberlain
2023-05-26 8:07 ` [RFC v2 0/8] add support for blocksize > PAGE_SIZE Luis Chamberlain
2023-05-26 8:14 ` Christoph Hellwig
2023-05-26 8:18 ` Luis Chamberlain
2023-05-26 8:28 ` Christoph Hellwig
2023-05-26 8:35 ` Luis Chamberlain
2023-05-26 13:54 ` Matthew Wilcox
2023-05-26 17:33 ` Luis Chamberlain
2023-05-26 18:43 ` Matthew Wilcox [this message]
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