mirror of
https://github.com/linux-msm/laptops-kernel.git
synced 2026-08-13 14:19:53 -07:00
Ackerley TngandAndrew Morton
66a4e9e11e
Move memory policy interpretation out of alloc_buddy_hugetlb_folio_with_mpol() and into alloc_hugetlb_folio() to separate reading and interpretation of memory policy from actual allocation. This will later allow memory policy to be interpreted outside of the process of allocating a hugetlb folio entirely. This opens doors for other callers of the HugeTLB folio allocation function, such as guest_memfd, where memory may not always be mapped and hence may not have an associated vma. Introduce struct mempolicy_interpreted to hold all the components of an interpreted memory policy. Rename alloc_buddy_hugetlb_folio_with_mpol() to alloc_buddy_hugetlb_folio() since the function no longer interprets memory policy. No functional change intended. Link: https://lore.kernel.org/20260702-hugetlb-open-up-v4-2-d53cefcccf34@google.com Signed-off-by: Ackerley Tng <ackerleytng@google.com> Reviewed-by: James Houghton <jthoughton@google.com> Acked-by: Oscar Salvador <osalvador@suse.de> Cc: Alistair Popple <apopple@nvidia.com> Cc: Byungchul Park <byungchul@sk.com> Cc: David Hildenbrand <david@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> Cc: Frank van der Linden <fvdl@google.com> Cc: Gregory Price <gourry@gourry.net> Cc: "Huang, Ying" <ying.huang@linux.alibaba.com> Cc: Jason Gunthorpe <jgg@ziepe.ca> Cc: Jiaqi Yan <jiaqiyan@google.com> Cc: Joshua Hahn <joshua.hahnjy@gmail.com> Cc: Matthew Brost <matthew.brost@intel.com> Cc: Michael Roth <michael.roth@amd.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Muchun Song <muchun.song@linux.dev> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Pasha Tatashin <pasha.tatashin@soleen.com> Cc: Peter Xu <peterx@redhat.com> Cc: Pratyush Yadav <pratyush@kernel.org> Cc: Qi Zheng <qi.zheng@linux.dev> Cc: Rakie Kim <rakie.kim@sk.com> Cc: Roman Gushchin <roman.gushchin@linux.dev> Cc: Sean Christopherson <seanjc@google.com> Cc: Shakeel Butt <shakeel.butt@linux.dev> Cc: Shivank Garg <shivankg@amd.com> Cc: Vishal Annapurve <vannapurve@google.com> Cc: Yan Zhao <yan.y.zhao@intel.com> Cc: Zi Yan <ziy@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
86 lines
3.0 KiB
C
86 lines
3.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
|
|
/*
|
|
* NUMA memory policies for Linux.
|
|
* Copyright 2003,2004 Andi Kleen SuSE Labs
|
|
*/
|
|
#ifndef _UAPI_LINUX_MEMPOLICY_H
|
|
#define _UAPI_LINUX_MEMPOLICY_H
|
|
|
|
#include <linux/errno.h>
|
|
|
|
|
|
/*
|
|
* Both the MPOL_* mempolicy mode and the MPOL_F_* optional mode flags are
|
|
* passed by the user to either set_mempolicy() or mbind() in an 'int' actual.
|
|
* The MPOL_MODE_FLAGS macro determines the legal set of optional mode flags.
|
|
*/
|
|
|
|
/* Policies */
|
|
enum mempolicy_mode {
|
|
MPOL_DEFAULT,
|
|
MPOL_PREFERRED,
|
|
MPOL_BIND,
|
|
MPOL_INTERLEAVE,
|
|
MPOL_LOCAL,
|
|
MPOL_PREFERRED_MANY,
|
|
MPOL_WEIGHTED_INTERLEAVE,
|
|
MPOL_MAX, /* always last member of enum */
|
|
};
|
|
|
|
/* Flags for set_mempolicy */
|
|
#define MPOL_F_STATIC_NODES (1 << 15)
|
|
#define MPOL_F_RELATIVE_NODES (1 << 14)
|
|
#define MPOL_F_NUMA_BALANCING (1 << 13) /* Optimize with NUMA balancing if possible */
|
|
|
|
/*
|
|
* MPOL_MODE_FLAGS is the union of all possible optional mode flags passed to
|
|
* either set_mempolicy() or mbind().
|
|
*/
|
|
#define MPOL_MODE_FLAGS \
|
|
(MPOL_F_STATIC_NODES | MPOL_F_RELATIVE_NODES | MPOL_F_NUMA_BALANCING)
|
|
|
|
/* Whether the nodemask is specified by users */
|
|
#define MPOL_USER_NODEMASK_FLAGS (MPOL_F_STATIC_NODES | MPOL_F_RELATIVE_NODES)
|
|
|
|
/* Flags for get_mempolicy */
|
|
#define MPOL_F_NODE (1<<0) /* return next IL mode instead of node mask */
|
|
#define MPOL_F_ADDR (1<<1) /* look up vma using address */
|
|
#define MPOL_F_MEMS_ALLOWED (1<<2) /* return allowed memories */
|
|
|
|
/* Flags for mbind */
|
|
#define MPOL_MF_STRICT (1<<0) /* Verify existing pages in the mapping */
|
|
#define MPOL_MF_MOVE (1<<1) /* Move pages owned by this process to conform
|
|
to policy */
|
|
#define MPOL_MF_MOVE_ALL (1<<2) /* Move every page to conform to policy */
|
|
#define MPOL_MF_LAZY (1<<3) /* UNSUPPORTED FLAG: Lazy migrate on fault */
|
|
#define MPOL_MF_INTERNAL (1<<4) /* Internal flags start here */
|
|
|
|
#define MPOL_MF_VALID (MPOL_MF_STRICT | \
|
|
MPOL_MF_MOVE | \
|
|
MPOL_MF_MOVE_ALL)
|
|
|
|
/*
|
|
* Internal flags that share the struct mempolicy flags word with
|
|
* "mode flags". These flags are allocated from bit 0 up, as they
|
|
* are never OR'ed into the mode in mempolicy API arguments.
|
|
*/
|
|
#define MPOL_F_SHARED (1 << 0) /* identify shared policies */
|
|
#define MPOL_F_MOF (1 << 3) /* this policy wants migrate on fault */
|
|
#define MPOL_F_MORON (1 << 4) /* Migrate On protnone Reference On Node */
|
|
|
|
/*
|
|
* Enabling zone reclaim means the page allocator will attempt to fulfill
|
|
* the allocation request on the current node by triggering reclaim and
|
|
* trying to shrink the current node.
|
|
* Fallback allocations on the next candidates in the zonelist are considered
|
|
* when reclaim fails to free up enough memory in the current node/zone.
|
|
*
|
|
* These bit locations are exposed in the vm.zone_reclaim_mode sysctl.
|
|
* New bits are OK, but existing bits should not be changed.
|
|
*/
|
|
#define RECLAIM_ZONE (1<<0) /* Enable zone reclaim */
|
|
#define RECLAIM_WRITE (1<<1) /* Writeout pages during reclaim */
|
|
#define RECLAIM_UNMAP (1<<2) /* Unmap pages during reclaim */
|
|
|
|
#endif /* _UAPI_LINUX_MEMPOLICY_H */
|