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mm: fixup documentation regarding pte_numa() and PROT_NUMA

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pte_numa() no longer exists -- replaced by pte_protnone() -- and PROT_NUMA
probably never existed: MM_CP_PROT_NUMA also ends up using PROT_NONE.

Let's fixup the doc.

Link: https://lkml.kernel.org/r/20220825164659.89824-4-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Peter Xu <peterx@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
David Hildenbrand 2022-08-25 18:46:59 +02:00 • committed by Andrew Morton
parent 0cf459866a
commit 7014887a01
1 changed files with 6 additions and 6 deletions
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12
include/linux/mm_types.h
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@ -614,22 +614,22 @@ struct mm_struct {
#endif #endif
#ifdef CONFIG_NUMA_BALANCING #ifdef CONFIG_NUMA_BALANCING
/* /*
* numa_next_scan is the next time that the PTEs will be marked * numa_next_scan is the next time that PTEs will be remapped
* pte_numa. NUMA hinting faults will gather statistics and * PROT_NONE to trigger NUMA hinting faults; such faults gather
* migrate pages to new nodes if necessary. * statistics and migrate pages to new nodes if necessary.
*/ */
unsigned long numa_next_scan; unsigned long numa_next_scan;
/* Restart point for scanning and setting pte_numa */ /* Restart point for scanning and remapping PTEs. */
unsigned long numa_scan_offset; unsigned long numa_scan_offset;
/* numa_scan_seq prevents two threads setting pte_numa */ /* numa_scan_seq prevents two threads remapping PTEs. */
int numa_scan_seq; int numa_scan_seq;
#endif #endif
/* /*
* An operation with batched TLB flushing is going on. Anything * An operation with batched TLB flushing is going on. Anything
* that can move process memory needs to flush the TLB when * that can move process memory needs to flush the TLB when
* moving a PROT_NONE or PROT_NUMA mapped page. * moving a PROT_NONE mapped page.
*/ */
atomic_t tlb_flush_pending; atomic_t tlb_flush_pending;
#ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH #ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH