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mm: allow THP orders for PFNMAPs

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This enables PFNMAPs to be mapped at either pmd/pud layers.  Generalize the
dax case into vma_is_special_huge() so as to cover both.  Meanwhile, rename
the macro to THP_ORDERS_ALL_SPECIAL.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Peter Xu <[email protected]>
Reviewed-by: Jason Gunthorpe <[email protected]>
Acked-by: David Hildenbrand <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Gavin Shan <[email protected]>
Cc: Ryan Roberts <[email protected]>
Cc: Zi Yan <[email protected]>
Cc: Alexander Gordeev <[email protected]>
Cc: Alex Williamson <[email protected]>
Cc: Aneesh Kumar K.V <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Christian Borntraeger <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Gerald Schaefer <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Niklas Schnelle <[email protected]>
Cc: Paolo Bonzini <[email protected]>
Cc: Sean Christopherson <[email protected]>
Cc: Sven Schnelle <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Vasily Gorbik <[email protected]>
Cc: Will Deacon <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
This commit is contained in:
Peter Xu authored and Andrew Morton committed 2024-09-17 01:06:58 -07:00
1 parent 3c8e44c9b3
commit 5dd40721f1
2 files changed
+5 -5
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include/linux/huge_mm.h
+3 -3
View File
@@ -76,9 +76,9 @@ extern struct kobj_attribute thpsize_shmem_enabled_attr;
/*
* Mask of all large folio orders supported for file THP. Folios in a DAX
* file is never split and the MAX_PAGECACHE_ORDER limit does not apply to
* it.
* it. Same to PFNMAPs where there's neither page* nor pagecache.
*/
#define THP_ORDERS_ALL_FILE_DAX \
#define THP_ORDERS_ALL_SPECIAL \
(BIT(PMD_ORDER) | BIT(PUD_ORDER))
#define THP_ORDERS_ALL_FILE_DEFAULT \
((BIT(MAX_PAGECACHE_ORDER + 1) - 1) & ~BIT(0))
@@ -87,7 +87,7 @@ extern struct kobj_attribute thpsize_shmem_enabled_attr;
* Mask of all large folio orders supported for THP.
*/
#define THP_ORDERS_ALL \
(THP_ORDERS_ALL_ANON | THP_ORDERS_ALL_FILE_DAX | THP_ORDERS_ALL_FILE_DEFAULT)
(THP_ORDERS_ALL_ANON | THP_ORDERS_ALL_SPECIAL | THP_ORDERS_ALL_FILE_DEFAULT)
#define TVA_SMAPS (1 << 0) /* Will be used for procfs */
#define TVA_IN_PF (1 << 1) /* Page fault handler */
mm/huge_memory.c
+2 -2
View File
@@ -97,8 +97,8 @@ unsigned long __thp_vma_allowable_orders(struct vm_area_struct *vma,
/* Check the intersection of requested and supported orders. */
if (vma_is_anonymous(vma))
supported_orders = THP_ORDERS_ALL_ANON;
else if (vma_is_dax(vma))
supported_orders = THP_ORDERS_ALL_FILE_DAX;
else if (vma_is_special_huge(vma))
supported_orders = THP_ORDERS_ALL_SPECIAL;
else
supported_orders = THP_ORDERS_ALL_FILE_DEFAULT;