1.. SPDX-License-Identifier: GPL-2.0
 2
 3==========
 4Page Cache
 5==========
 6
 7The page cache is the primary way that the user and the rest of the kernel
 8interact with filesystems.  It can be bypassed (e.g. with O_DIRECT),
 9but normal reads, writes and mmaps go through the page cache.
10
11Folios
12======
13
14The folio is the unit of memory management within the page cache.
15Operations 

1.. SPDX-License-Identifier: GPL-2.0
2
3==========
4Page Cache
5==========