diff options
| author | Dave Airlie <airlied@redhat.com> | 2020-04-03 06:09:51 +1000 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2020-04-03 09:07:49 +1000 |
| commit | 0e7e6198af28c1573267aba1be33dd0b7fb35691 (patch) | |
| tree | ec51021f5684005c7d6358b81ab7de690a3834e0 /include/linux/mm.h | |
| parent | 59e7a8cc2dcf335116d500d684bfb34d1d97a6fe (diff) | |
| parent | 9431042dbc8ce490d49c7f9d5142805b6249208b (diff) | |
Merge branch 'ttm-transhuge' of git://people.freedesktop.org/~thomash/linux into drm-next
Huge page-table entries for TTM
In order to reduce CPU usage [1] and in theory TLB misses this patchset enables
huge- and giant page-table entries for TTM and TTM-enabled graphics drivers.
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Thomas Hellstrom (VMware) <thomas_os@shipmail.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200325073102.6129-1-thomas_os@shipmail.org
Diffstat (limited to 'include/linux/mm.h')
| -rw-r--r-- | include/linux/mm.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index c54fb96cb1e6..bdd79a72bb42 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2867,6 +2867,23 @@ extern long copy_huge_page_from_user(struct page *dst_page, const void __user *usr_src, unsigned int pages_per_huge_page, bool allow_pagefault); + +/** + * vma_is_special_huge - Are transhuge page-table entries considered special? + * @vma: Pointer to the struct vm_area_struct to consider + * + * Whether transhuge page-table entries are considered "special" following + * the definition in vm_normal_page(). + * + * Return: true if transhuge page-table entries should be considered special, + * false otherwise. + */ +static inline bool vma_is_special_huge(const struct vm_area_struct *vma) +{ + return vma_is_dax(vma) || (vma->vm_file && + (vma->vm_flags & (VM_PFNMAP | VM_MIXEDMAP))); +} + #endif /* CONFIG_TRANSPARENT_HUGEPAGE || CONFIG_HUGETLBFS */ #ifdef CONFIG_DEBUG_PAGEALLOC |