Merge branch 'akpm' (patches from Andrew)

Merge misc updates from Andrew Morton: - a few MM hotfixes - kthread, tools, scripts, ntfs and ocfs2 - some of MM Subsystems affected by this patch series: kthread, tools, scripts, ntfs, ocfs2 and mm (hofixes, pagealloc, slab-generic, slab, slub, kcsan, debug, pagecache, gup, swap, shmem, memcg, pagemap, mremap, mincore, sparsemem, vmalloc, kasan, pagealloc, hugetlb and vmscan). * emailed patches from Andrew Morton <[email protected]>: (162 commits) mm: vmscan: consistent update to pgrefill mm/vmscan.c: fix typo khugepaged: khugepaged_test_exit() check mmget_still_valid() khugepaged: retract_page_tables() remember to test exit khugepaged: collapse_pte_mapped_thp() protect the pmd lock khugepaged: collapse_pte_mapped_thp() flush the right range mm/hugetlb: fix calculation of adjust_range_if_pmd_sharing_possible mm: thp: replace HTTP links with HTTPS ones mm/page_alloc: fix memalloc_nocma_{save/restore} APIs mm/page_alloc.c: skip setting nodemask when we are in interrupt mm/page_alloc: fallbacks at most has 3 elements mm/page_alloc: silence a KASAN false positive mm/page_alloc.c: remove unnecessary end_bitidx for [set|get]_pfnblock_flags_mask() mm/page_alloc.c: simplify pageblock bitmap access mm/page_alloc.c: extract the common part in pfn_to_bitidx() mm/page_alloc.c: replace the definition of NR_MIGRATETYPE_BITS with PB_migratetype_bits mm/shuffle: remove dynamic reconfiguration mm/memory_hotplug: document why shuffle_zone() is relevant mm/page_alloc: remove nr_free_pagecache_pages() mm: remove vm_total_pages ...
josf · Aug 7, 2020 · 81e1133 · 81e1133
2 parents 5631c5e + 912c057
commit 81e1133
Show file tree

Hide file tree

Showing 396 changed files with 4,868 additions and 3,399 deletions.
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
@@ -4693,7 +4693,7 @@
 			fragmentation.  Defaults to 1 for systems with
 			more than 32MB of RAM, 0 otherwise.
 
-	slub_debug[=options[,slabs]]	[MM, SLUB]
+	slub_debug[=options[,slabs][;[options[,slabs]]...]	[MM, SLUB]
 			Enabling slub_debug allows one to determine the
 			culprit if slab objects become corrupted. Enabling
 			slub_debug can create guard zones around objects and

diff --git a/Documentation/dev-tools/kasan.rst b/Documentation/dev-tools/kasan.rst
@@ -13,11 +13,8 @@ KASAN uses compile-time instrumentation to insert validity checks before every
 memory access, and therefore requires a compiler version that supports that.
 
 Generic KASAN is supported in both GCC and Clang. With GCC it requires version
-4.9.2 or later for basic support and version 5.0 or later for detection of
-out-of-bounds accesses for stack and global variables and for inline
-instrumentation mode (see the Usage section). With Clang it requires version
-7.0.0 or later and it doesn't support detection of out-of-bounds accesses for
-global variables yet.
+8.3.0 or later. With Clang it requires version 7.0.0 or later, but detection of
+out-of-bounds accesses for global variables is only supported since Clang 11.
 
 Tag-based KASAN is only supported in Clang and requires version 7.0.0 or later.
 
@@ -193,6 +190,9 @@ function calls GCC directly inserts the code to check the shadow memory.
 This option significantly enlarges kernel but it gives x1.1-x2 performance
 boost over outline instrumented kernel.
 
+Generic KASAN prints up to 2 call_rcu() call stacks in reports, the last one
+and the second to last.
+
 Software tag-based KASAN
 ~~~~~~~~~~~~~~~~~~~~~~~~
 

diff --git a/Documentation/filesystems/dlmfs.rst b/Documentation/filesystems/dlmfs.rst
@@ -12,7 +12,7 @@ dlmfs is built with OCFS2 as it requires most of its infrastructure.
 
 :Project web page:    http://ocfs2.wiki.kernel.org
 :Tools web page:      https://github.com/markfasheh/ocfs2-tools
-:OCFS2 mailing lists: http://oss.oracle.com/projects/ocfs2/mailman/
+:OCFS2 mailing lists: https://oss.oracle.com/projects/ocfs2/mailman/
 
 All code copyright 2005 Oracle except when otherwise noted.
 

diff --git a/Documentation/filesystems/ocfs2.rst b/Documentation/filesystems/ocfs2.rst
@@ -14,7 +14,7 @@ get "mount.ocfs2" and "ocfs2_hb_ctl".
 
 Project web page:    http://ocfs2.wiki.kernel.org
 Tools git tree:      https://github.com/markfasheh/ocfs2-tools
-OCFS2 mailing lists: http://oss.oracle.com/projects/ocfs2/mailman/
+OCFS2 mailing lists: https://oss.oracle.com/projects/ocfs2/mailman/
 
 All code copyright 2005 Oracle except when otherwise noted.
 

diff --git a/Documentation/filesystems/tmpfs.rst b/Documentation/filesystems/tmpfs.rst
@@ -150,6 +150,22 @@ These options do not have any effect on remount. You can change these
 parameters with chmod(1), chown(1) and chgrp(1) on a mounted filesystem.
 
 
+tmpfs has a mount option to select whether it will wrap at 32- or 64-bit inode
+numbers:
+
+=======   ========================
+inode64   Use 64-bit inode numbers
+inode32   Use 32-bit inode numbers
+=======   ========================
+
+On a 32-bit kernel, inode32 is implicit, and inode64 is refused at mount time.
+On a 64-bit kernel, CONFIG_TMPFS_INODE64 sets the default.  inode64 avoids the
+possibility of multiple files with the same inode number on a single device;
+but risks glibc failing with EOVERFLOW once 33-bit inode numbers are reached -
+if a long-lived tmpfs is accessed by 32-bit applications so ancient that
+opening a file larger than 2GiB fails with EINVAL.
+
+
 So 'mount -t tmpfs -o size=10G,nr_inodes=10k,mode=700 tmpfs /mytmpfs'
 will give you tmpfs instance on /mytmpfs which can allocate 10GB
 RAM/SWAP in 10240 inodes and it is only accessible by root.
@@ -161,3 +177,5 @@ RAM/SWAP in 10240 inodes and it is only accessible by root.
    Hugh Dickins, 4 June 2007
 :Updated:
    KOSAKI Motohiro, 16 Mar 2010
+:Updated:
+   Chris Down, 13 July 2020
diff --git a/Documentation/vm/arch_pgtable_helpers.rst b/Documentation/vm/arch_pgtable_helpers.rst
diff --git a/Documentation/vm/memory-model.rst b/Documentation/vm/memory-model.rst
@@ -141,11 +141,8 @@ sections:
   `mem_section` objects and the number of rows is calculated to fit
   all the memory sections.
 
-The architecture setup code should call :c:func:`memory_present` for
-each active memory range or use :c:func:`memblocks_present` or
-:c:func:`sparse_memory_present_with_active_regions` wrappers to
-initialize the memory sections. Next, the actual memory maps should be
-set up using :c:func:`sparse_init`.
+The architecture setup code should call sparse_init() to
+initialize the memory sections and the memory maps.
 
 With SPARSEMEM there are two possible ways to convert a PFN to the
 corresponding `struct page` - a "classic sparse" and "sparse
@@ -178,7 +175,7 @@ for persistent memory devices in pre-allocated storage on those
 devices. This storage is represented with :c:type:`struct vmem_altmap`
 that is eventually passed to vmemmap_populate() through a long chain
 of function calls. The vmemmap_populate() implementation may use the
-`vmem_altmap` along with :c:func:`altmap_alloc_block_buf` helper to
+`vmem_altmap` along with :c:func:`vmemmap_alloc_block_buf` helper to
 allocate memory map on the persistent memory device.
 
 ZONE_DEVICE

diff --git a/Documentation/vm/slub.rst b/Documentation/vm/slub.rst
@@ -41,6 +41,11 @@ slub_debug=<Debug-Options>,<slab name1>,<slab name2>,...
 	Enable options only for select slabs (no spaces
 	after a comma)
 
+Multiple blocks of options for all slabs or selected slabs can be given, with
+blocks of options delimited by ';'. The last of "all slabs" blocks is applied
+to all slabs except those that match one of the "select slabs" block. Options
+of the first "select slabs" blocks that matches the slab's name are applied.
+
 Possible debug options are::
 
 	F		Sanity checks on (enables SLAB_DEBUG_CONSISTENCY_CHECKS
@@ -83,17 +88,33 @@ switch off debugging for such caches by default, use::
 
 	slub_debug=O
 
-In case you forgot to enable debugging on the kernel command line: It is
-possible to enable debugging manually when the kernel is up. Look at the
-contents of::
+You can apply different options to different list of slab names, using blocks
+of options. This will enable red zoning for dentry and user tracking for
+kmalloc. All other slabs will not get any debugging enabled::
+
+	slub_debug=Z,dentry;U,kmalloc-*
+
+You can also enable options (e.g. sanity checks and poisoning) for all caches
+except some that are deemed too performance critical and don't need to be
+debugged by specifying global debug options followed by a list of slab names
+with "-" as options::
+
+	slub_debug=FZ;-,zs_handle,zspage
+
+The state of each debug option for a slab can be found in the respective files
+under::
 
 	/sys/kernel/slab/<slab name>/
 
-Look at the writable files. Writing 1 to them will enable the
-corresponding debug option. All options can be set on a slab that does
-not contain objects. If the slab already contains objects then sanity checks
-and tracing may only be enabled. The other options may cause the realignment
-of objects.
+If the file contains 1, the option is enabled, 0 means disabled. The debug
+options from the ``slub_debug`` parameter translate to the following files::
+
+	F	sanity_checks
+	Z	red_zone
+	P	poison
+	U	store_user
+	T	trace
+	A	failslab
 
 Careful with tracing: It may spew out lots of information and never stop if
 used on the wrong slab.

diff --git a/arch/alpha/include/asm/pgalloc.h b/arch/alpha/include/asm/pgalloc.h
@@ -5,7 +5,7 @@
 #include <linux/mm.h>
 #include <linux/mmzone.h>
 
-#include <asm-generic/pgalloc.h>	/* for pte_{alloc,free}_one */
+#include <asm-generic/pgalloc.h>
 
 /*      
  * Allocate and free page tables. The xxx_kernel() versions are
@@ -34,23 +34,4 @@ pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
 
 extern pgd_t *pgd_alloc(struct mm_struct *mm);
 
-static inline void
-pgd_free(struct mm_struct *mm, pgd_t *pgd)
-{
-	free_page((unsigned long)pgd);
-}
-
-static inline pmd_t *
-pmd_alloc_one(struct mm_struct *mm, unsigned long address)
-{
-	pmd_t *ret = (pmd_t *)__get_free_page(GFP_PGTABLE_USER);
-	return ret;
-}
-
-static inline void
-pmd_free(struct mm_struct *mm, pmd_t *pmd)
-{
-	free_page((unsigned long)pmd);
-}
-
 #endif /* _ALPHA_PGALLOC_H */
diff --git a/arch/alpha/include/asm/tlbflush.h b/arch/alpha/include/asm/tlbflush.h
@@ -5,7 +5,6 @@
 #include <linux/mm.h>
 #include <linux/sched.h>
 #include <asm/compiler.h>
-#include <asm/pgalloc.h>
 
 #ifndef __EXTERN_INLINE
 #define __EXTERN_INLINE extern inline

diff --git a/arch/alpha/kernel/core_irongate.c b/arch/alpha/kernel/core_irongate.c
@@ -302,7 +302,6 @@ irongate_init_arch(void)
 #include <linux/agp_backend.h>
 #include <linux/agpgart.h>
 #include <linux/export.h>
-#include <asm/pgalloc.h>
 
 #define GET_PAGE_DIR_OFF(addr) (addr >> 22)
 #define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr))

diff --git a/arch/alpha/kernel/core_marvel.c b/arch/alpha/kernel/core_marvel.c
@@ -23,7 +23,6 @@
 #include <asm/ptrace.h>
 #include <asm/smp.h>
 #include <asm/gct.h>
-#include <asm/pgalloc.h>
 #include <asm/tlbflush.h>
 #include <asm/vga.h>
 

diff --git a/arch/alpha/kernel/core_titan.c b/arch/alpha/kernel/core_titan.c
@@ -20,7 +20,6 @@
 
 #include <asm/ptrace.h>
 #include <asm/smp.h>
-#include <asm/pgalloc.h>
 #include <asm/tlbflush.h>
 #include <asm/vga.h>
 

diff --git a/arch/alpha/kernel/machvec_impl.h b/arch/alpha/kernel/machvec_impl.h
@@ -7,8 +7,6 @@
  * This file has goodies to help simplify instantiation of machine vectors.
  */
 
-#include <asm/pgalloc.h>
-
 /* Whee.  These systems don't have an HAE:
        IRONGATE, MARVEL, POLARIS, TSUNAMI, TITAN, WILDFIRE
    Fix things up for the GENERIC kernel by defining the HAE address

diff --git a/arch/alpha/kernel/smp.c b/arch/alpha/kernel/smp.c
@@ -36,7 +36,6 @@
 
 #include <asm/io.h>
 #include <asm/irq.h>
-#include <asm/pgalloc.h>
 #include <asm/mmu_context.h>
 #include <asm/tlbflush.h>
 

diff --git a/arch/alpha/mm/numa.c b/arch/alpha/mm/numa.c
@@ -17,7 +17,6 @@
 #include <linux/module.h>
 
 #include <asm/hwrpb.h>
-#include <asm/pgalloc.h>
 #include <asm/sections.h>
 
 pg_data_t node_data[MAX_NUMNODES];

diff --git a/arch/arc/mm/fault.c b/arch/arc/mm/fault.c
@@ -13,7 +13,6 @@
 #include <linux/kdebug.h>
 #include <linux/perf_event.h>
 #include <linux/mm_types.h>
-#include <asm/pgalloc.h>
 #include <asm/mmu.h>
 
 /*

diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c
@@ -14,7 +14,6 @@
 #include <linux/module.h>
 #include <linux/highmem.h>
 #include <asm/page.h>
-#include <asm/pgalloc.h>
 #include <asm/sections.h>
 #include <asm/arcregs.h>
 

diff --git a/arch/arm/include/asm/pgalloc.h b/arch/arm/include/asm/pgalloc.h
@@ -22,17 +22,6 @@
 
 #ifdef CONFIG_ARM_LPAE
 
-static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
-{
-	return (pmd_t *)get_zeroed_page(GFP_KERNEL);
-}
-
-static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
-{
-	BUG_ON((unsigned long)pmd & (PAGE_SIZE-1));
-	free_page((unsigned long)pmd);
-}
-
 static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
 {
 	set_pud(pud, __pud(__pa(pmd) | PMD_TYPE_TABLE));
@@ -76,6 +65,7 @@ static inline void clean_pte_table(pte_t *pte)
 
 #define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL
 #define __HAVE_ARCH_PTE_ALLOC_ONE
+#define __HAVE_ARCH_PGD_FREE
 #include <asm-generic/pgalloc.h>
 
 static inline pte_t *

diff --git a/arch/arm/include/asm/tlb.h b/arch/arm/include/asm/tlb.h
@@ -27,7 +27,6 @@
 #else /* !CONFIG_MMU */
 
 #include <linux/swap.h>
-#include <asm/pgalloc.h>
 #include <asm/tlbflush.h>
 
 static inline void __tlb_remove_table(void *_table)

diff --git a/arch/arm/kernel/machine_kexec.c b/arch/arm/kernel/machine_kexec.c
@@ -11,7 +11,6 @@
 #include <linux/irq.h>
 #include <linux/memblock.h>
 #include <linux/of_fdt.h>
-#include <asm/pgalloc.h>
 #include <asm/mmu_context.h>
 #include <asm/cacheflush.h>
 #include <asm/fncpy.h>

diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
@@ -37,7 +37,6 @@
 #include <asm/idmap.h>
 #include <asm/topology.h>
 #include <asm/mmu_context.h>
-#include <asm/pgalloc.h>
 #include <asm/procinfo.h>
 #include <asm/processor.h>
 #include <asm/sections.h>

diff --git a/arch/arm/kernel/suspend.c b/arch/arm/kernel/suspend.c
@@ -7,7 +7,6 @@
 #include <asm/bugs.h>
 #include <asm/cacheflush.h>
 #include <asm/idmap.h>
-#include <asm/pgalloc.h>
 #include <asm/memory.h>
 #include <asm/smp_plat.h>
 #include <asm/suspend.h>

diff --git a/arch/arm/mach-omap2/omap-mpuss-lowpower.c b/arch/arm/mach-omap2/omap-mpuss-lowpower.c
@@ -42,7 +42,6 @@
 #include <asm/cacheflush.h>
 #include <asm/tlbflush.h>
 #include <asm/smp_scu.h>
-#include <asm/pgalloc.h>
 #include <asm/suspend.h>
 #include <asm/virt.h>
 #include <asm/hardware/cache-l2x0.h>

diff --git a/arch/arm/mm/hugetlbpage.c b/arch/arm/mm/hugetlbpage.c
@@ -17,7 +17,6 @@
 #include <asm/mman.h>
 #include <asm/tlb.h>
 #include <asm/tlbflush.h>
-#include <asm/pgalloc.h>
 
 /*
  * On ARM, huge pages are backed by pmd's rather than pte's, so we do a lot

diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
@@ -243,13 +243,8 @@ void __init bootmem_init(void)
 		      (phys_addr_t)max_low_pfn << PAGE_SHIFT);
 
 	/*
-	 * Sparsemem tries to allocate bootmem in memory_present(),
-	 * so must be done after the fixed reservations
-	 */
-	memblocks_present();
-
-	/*
-	 * sparse_init() needs the bootmem allocator up and running.
+	 * sparse_init() tries to allocate memory from memblock, so must be
+	 * done after the fixed reservations
 	 */
 	sparse_init();
 

diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
@@ -29,6 +29,7 @@
 #include <asm/traps.h>
 #include <asm/procinfo.h>
 #include <asm/memory.h>
+#include <asm/pgalloc.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>