linux-stable/Documentation/mm/page_cache.rst

.. SPDX-License-Identifier: GPL-2.0

==========
Page Cache
==========

The page cache is the primary way that the user and the rest of the kernel
interact with filesystems.  It can be bypassed (e.g. with O_DIRECT),
but normal reads, writes and mmaps go through the page cache.

Folios
======

The folio is the unit of memory management within the page cache.
Operations
mm,doc: Add new documentation structure Closely following the outline of Mel Gorman's book "Understanding the Linux Virtual Memory Manager", add a new outline. Preserve the current contents of the mm underneath the new outline so we can transition those documents to a more sensible place later. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: John Hubbard <jhubbard@nvidia.com> Acked-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Link: https://lore.kernel.org/r/20220507134947.444287-1-willy@infradead.org Signed-off-by: Jonathan Corbet <corbet@lwn.net> 2022-05-07 13:49:47 +00:00			`.. SPDX-License-Identifier: GPL-2.0`

			`==========`
			`Page Cache`
			`==========`
ubifs: Convert ubifs_vm_page_mkwrite() to use a folio Replace six implicit calls to compound_head() with one. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Zhihao Cheng <chengzhihao1@huawei.com> Signed-off-by: Richard Weinberger <richard@nod.at> 2024-01-24 17:52:49 +00:00
			`The page cache is the primary way that the user and the rest of the kernel`
			`interact with filesystems. It can be bypassed (e.g. with O_DIRECT),`
			`but normal reads, writes and mmaps go through the page cache.`

			`Folios`
			`======`

			`The folio is the unit of memory management within the page cache.`
			`Operations`