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Ackerley Tng
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/[email protected] Signed-off-by: Ackerley Tng <[email protected]> Reviewed-by: James Houghton <[email protected]> Acked-by: Oscar Salvador <[email protected]> Cc: Alistair Popple <[email protected]> Cc: Byungchul Park <[email protected]> Cc: David Hildenbrand <[email protected]> Cc: David Rientjes <[email protected]> Cc: "Edgecombe, Rick P" <[email protected]> Cc: Frank van der Linden <[email protected]> Cc: Gregory Price <[email protected]> Cc: "Huang, Ying" <[email protected]> Cc: Jason Gunthorpe <[email protected]> Cc: Jiaqi Yan <[email protected]> Cc: Joshua Hahn <[email protected]> Cc: Matthew Brost <[email protected]> Cc: Michael Roth <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Muchun Song <[email protected]> Cc: Paolo Bonzini <[email protected]> Cc: Pasha Tatashin <[email protected]> Cc: Peter Xu <[email protected]> Cc: Pratyush Yadav <[email protected]> Cc: Qi Zheng <[email protected]> Cc: Rakie Kim <[email protected]> Cc: Roman Gushchin <[email protected]> Cc: Sean Christopherson <[email protected]> Cc: Shakeel Butt <[email protected]> Cc: Shivank Garg <[email protected]> Cc: Vishal Annapurve <[email protected]> Cc: Yan Zhao <[email protected]> Cc: Zi Yan <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
86 lines
3.0 KiB
C
86 lines
3.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* NUMA memory policies for Linux.
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* Copyright 2003,2004 Andi Kleen SuSE Labs
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*/
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#ifndef _UAPI_LINUX_MEMPOLICY_H
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#define _UAPI_LINUX_MEMPOLICY_H
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#include <linux/errno.h>
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/*
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* Both the MPOL_* mempolicy mode and the MPOL_F_* optional mode flags are
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* passed by the user to either set_mempolicy() or mbind() in an 'int' actual.
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* The MPOL_MODE_FLAGS macro determines the legal set of optional mode flags.
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*/
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/* Policies */
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enum mempolicy_mode {
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MPOL_DEFAULT,
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MPOL_PREFERRED,
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MPOL_BIND,
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MPOL_INTERLEAVE,
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MPOL_LOCAL,
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MPOL_PREFERRED_MANY,
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MPOL_WEIGHTED_INTERLEAVE,
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MPOL_MAX, /* always last member of enum */
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};
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/* Flags for set_mempolicy */
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#define MPOL_F_STATIC_NODES (1 << 15)
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#define MPOL_F_RELATIVE_NODES (1 << 14)
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#define MPOL_F_NUMA_BALANCING (1 << 13) /* Optimize with NUMA balancing if possible */
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/*
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* MPOL_MODE_FLAGS is the union of all possible optional mode flags passed to
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* either set_mempolicy() or mbind().
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*/
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#define MPOL_MODE_FLAGS \
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(MPOL_F_STATIC_NODES | MPOL_F_RELATIVE_NODES | MPOL_F_NUMA_BALANCING)
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/* Whether the nodemask is specified by users */
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#define MPOL_USER_NODEMASK_FLAGS (MPOL_F_STATIC_NODES | MPOL_F_RELATIVE_NODES)
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/* Flags for get_mempolicy */
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#define MPOL_F_NODE (1<<0) /* return next IL mode instead of node mask */
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#define MPOL_F_ADDR (1<<1) /* look up vma using address */
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#define MPOL_F_MEMS_ALLOWED (1<<2) /* return allowed memories */
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/* Flags for mbind */
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#define MPOL_MF_STRICT (1<<0) /* Verify existing pages in the mapping */
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#define MPOL_MF_MOVE (1<<1) /* Move pages owned by this process to conform
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to policy */
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#define MPOL_MF_MOVE_ALL (1<<2) /* Move every page to conform to policy */
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#define MPOL_MF_LAZY (1<<3) /* UNSUPPORTED FLAG: Lazy migrate on fault */
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#define MPOL_MF_INTERNAL (1<<4) /* Internal flags start here */
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#define MPOL_MF_VALID (MPOL_MF_STRICT | \
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MPOL_MF_MOVE | \
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MPOL_MF_MOVE_ALL)
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/*
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* Internal flags that share the struct mempolicy flags word with
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* "mode flags". These flags are allocated from bit 0 up, as they
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* are never OR'ed into the mode in mempolicy API arguments.
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*/
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#define MPOL_F_SHARED (1 << 0) /* identify shared policies */
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#define MPOL_F_MOF (1 << 3) /* this policy wants migrate on fault */
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#define MPOL_F_MORON (1 << 4) /* Migrate On protnone Reference On Node */
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/*
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* Enabling zone reclaim means the page allocator will attempt to fulfill
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* the allocation request on the current node by triggering reclaim and
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* trying to shrink the current node.
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* Fallback allocations on the next candidates in the zonelist are considered
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* when reclaim fails to free up enough memory in the current node/zone.
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*
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* These bit locations are exposed in the vm.zone_reclaim_mode sysctl.
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* New bits are OK, but existing bits should not be changed.
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*/
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#define RECLAIM_ZONE (1<<0) /* Enable zone reclaim */
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#define RECLAIM_WRITE (1<<1) /* Writeout pages during reclaim */
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#define RECLAIM_UNMAP (1<<2) /* Unmap pages during reclaim */
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#endif /* _UAPI_LINUX_MEMPOLICY_H */
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