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authorLinus Torvalds <torvalds@linux-foundation.org>2024-03-21 15:09:29 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2024-03-21 15:09:29 -0700
commit85a79128c4f5723f812ab8d5ee465ec660e223f1 (patch)
treec7b658afff391c565023c5c02a16800aa93ee822 /Documentation/mm
parentcba9ffdb9913dfe6be29f049ce920ce451ce7cc4 (diff)
parentb8a77b9a5f9c2ba313f2beef8440b6f9f69768e7 (diff)
Merge tag 'ubifs-for-linus-6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs
Pull UBI and UBIFS updates from Richard Weinberger: "UBI: - Add Zhihao Cheng as reviewer - Attach via device tree - Add NVMEM layer - Various fastmap related fixes UBIFS: - Add Zhihao Cheng as reviewer - Convert to folios - Various fixes (memory leaks in error paths, function prototypes)" * tag 'ubifs-for-linus-6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs: (34 commits) mtd: ubi: fix NVMEM over UBI volumes on 32-bit systems mtd: ubi: provide NVMEM layer over UBI volumes mtd: ubi: populate ubi volume fwnode mtd: ubi: introduce pre-removal notification for UBI volumes mtd: ubi: attach from device tree mtd: ubi: block: use notifier to create ubiblock from parameter dt-bindings: mtd: ubi-volume: allow UBI volumes to provide NVMEM dt-bindings: mtd: add basic bindings for UBI ubifs: Queue up space reservation tasks if retrying many times ubifs: ubifs_symlink: Fix memleak of inode->i_link in error path ubifs: dbg_check_idx_size: Fix kmemleak if loading znode failed ubi: Correct the number of PEBs after a volume resize failure ubi: fix slab-out-of-bounds in ubi_eba_get_ldesc+0xfb/0x130 ubi: correct the calculation of fastmap size ubifs: Remove unreachable code in dbg_check_ltab_lnum ubifs: fix function pointer cast warnings ubifs: fix sort function prototype ubi: Check for too small LEB size in VTBL code MAINTAINERS: Add Zhihao Cheng as UBI/UBIFS reviewer ubifs: Convert populate_page() to take a folio ...
Diffstat (limited to 'Documentation/mm')
-rw-r--r--Documentation/mm/page_cache.rst10
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diff --git a/Documentation/mm/page_cache.rst b/Documentation/mm/page_cache.rst
index 75eba7c431b2..138d61f869df 100644
--- a/Documentation/mm/page_cache.rst
+++ b/Documentation/mm/page_cache.rst
@@ -3,3 +3,13 @@
==========
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