The patch titled
Subject: mm-introduce-vm_lockonfault-v9
has been added to the -mm tree. Its filename is
mm-introduce-vm_lockonfault-v9.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-introduce-vm_lockonfault-v9.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-introduce-vm_lockonfault-v9.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Eric B Munson <emunson@xxxxxxxxxx>
Subject: mm-introduce-vm_lockonfault-v9
Signed-off-by: Eric B Munson <emunson@xxxxxxxxxx>
Acked-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Cc: Michael Kerrisk <mtk.manpages@xxxxxxxxx>
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: Shuah Khan <shuahkh@xxxxxxxxxxxxxxx>
Cc: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/filesystems/proc.txt | 1 -
drivers/gpu/drm/drm_vm.c | 8 +-------
fs/proc/task_mmu.c | 1 -
include/linux/mm.h | 3 +++
kernel/fork.c | 4 ++--
mm/hugetlb.c | 4 ++--
mm/mlock.c | 2 +-
mm/mmap.c | 2 +-
mm/rmap.c | 6 ++----
9 files changed, 12 insertions(+), 19 deletions(-)
diff -puN Documentation/filesystems/proc.txt~mm-introduce-vm_lockonfault-v9 Documentation/filesystems/proc.txt
--- a/Documentation/filesystems/proc.txt~mm-introduce-vm_lockonfault-v9
+++ a/Documentation/filesystems/proc.txt
@@ -471,7 +471,6 @@ manner. The codes are the following:
rr - random read advise provided
dc - do not copy area on fork
de - do not expand area on remapping
- lf - mark area to lock pages when faulted in, do not pre-populate
ac - area is accountable
nr - swap space is not reserved for the area
ht - area uses huge tlb pages
diff -puN drivers/gpu/drm/drm_vm.c~mm-introduce-vm_lockonfault-v9 drivers/gpu/drm/drm_vm.c
--- a/drivers/gpu/drm/drm_vm.c~mm-introduce-vm_lockonfault-v9
+++ a/drivers/gpu/drm/drm_vm.c
@@ -699,15 +699,9 @@ int drm_vma_info(struct seq_file *m, voi
(void *)(unsigned long)virt_to_phys(high_memory));
list_for_each_entry(pt, &dev->vmalist, head) {
- char lock_flag = '-';
-
vma = pt->vma;
if (!vma)
continue;
- if (vma->vm_flags & VM_LOCKONFAULT)
- lock_flag = 'f';
- else if (vma->vm_flags & VM_LOCKED)
- lock_flag = 'l';
seq_printf(m,
"\n%5d 0x%pK-0x%pK %c%c%c%c%c%c 0x%08lx000",
pt->pid,
@@ -716,7 +710,7 @@ int drm_vma_info(struct seq_file *m, voi
vma->vm_flags & VM_WRITE ? 'w' : '-',
vma->vm_flags & VM_EXEC ? 'x' : '-',
vma->vm_flags & VM_MAYSHARE ? 's' : 'p',
- lock_flag,
+ vma->vm_flags & VM_LOCKED ? 'l' : '-',
vma->vm_flags & VM_IO ? 'i' : '-',
vma->vm_pgoff);
diff -puN fs/proc/task_mmu.c~mm-introduce-vm_lockonfault-v9 fs/proc/task_mmu.c
--- a/fs/proc/task_mmu.c~mm-introduce-vm_lockonfault-v9
+++ a/fs/proc/task_mmu.c
@@ -598,7 +598,6 @@ static void show_smap_vma_flags(struct s
[ilog2(VM_RAND_READ)] = "rr",
[ilog2(VM_DONTCOPY)] = "dc",
[ilog2(VM_DONTEXPAND)] = "de",
- [ilog2(VM_LOCKONFAULT)] = "lf",
[ilog2(VM_ACCOUNT)] = "ac",
[ilog2(VM_NORESERVE)] = "nr",
[ilog2(VM_HUGETLB)] = "ht",
diff -puN include/linux/mm.h~mm-introduce-vm_lockonfault-v9 include/linux/mm.h
--- a/include/linux/mm.h~mm-introduce-vm_lockonfault-v9
+++ a/include/linux/mm.h
@@ -202,6 +202,9 @@ extern unsigned int kobjsize(const void
/* This mask defines which mm->def_flags a process can inherit its parent */
#define VM_INIT_DEF_MASK VM_NOHUGEPAGE
+/* This mask is used to clear all the VMA flags used by mlock */
+#define VM_LOCKED_CLEAR_MASK (~(VM_LOCKED | VM_LOCKONFAULT))
+
/*
* mapping from the currently active vm_flags protection bits (the
* low four bits) to a page protection mask..
diff -puN kernel/fork.c~mm-introduce-vm_lockonfault-v9 kernel/fork.c
--- a/kernel/fork.c~mm-introduce-vm_lockonfault-v9
+++ a/kernel/fork.c
@@ -454,8 +454,8 @@ static int dup_mmap(struct mm_struct *mm
tmp->vm_mm = mm;
if (anon_vma_fork(tmp, mpnt))
goto fail_nomem_anon_vma_fork;
- tmp->vm_flags &= ~(VM_LOCKED | VM_UFFD_MISSING | VM_UFFD_WP |
- VM_LOCKONFAULT);
+ tmp->vm_flags &=
+ ~(VM_LOCKED|VM_LOCKONFAULT|VM_UFFD_MISSING|VM_UFFD_WP);
tmp->vm_next = tmp->vm_prev = NULL;
tmp->vm_userfaultfd_ctx = NULL_VM_UFFD_CTX;
file = tmp->vm_file;
diff -puN mm/hugetlb.c~mm-introduce-vm_lockonfault-v9 mm/hugetlb.c
--- a/mm/hugetlb.c~mm-introduce-vm_lockonfault-v9
+++ a/mm/hugetlb.c
@@ -4020,8 +4020,8 @@ static unsigned long page_table_shareabl
unsigned long s_end = sbase + PUD_SIZE;
/* Allow segments to share if only one is marked locked */
- unsigned long vm_flags = vma->vm_flags & ~(VM_LOCKED|VM_LOCKONFAULT);
- unsigned long svm_flags = svma->vm_flags & ~(VM_LOCKED|VM_LOCKONFAULT);
+ unsigned long vm_flags = vma->vm_flags & VM_LOCKED_CLEAR_MASK;
+ unsigned long svm_flags = svma->vm_flags & VM_LOCKED_CLEAR_MASK;
/*
* match the virtual addresses, permission and the alignment of the
diff -puN mm/mlock.c~mm-introduce-vm_lockonfault-v9 mm/mlock.c
--- a/mm/mlock.c~mm-introduce-vm_lockonfault-v9
+++ a/mm/mlock.c
@@ -422,7 +422,7 @@ static unsigned long __munlock_pagevec_f
void munlock_vma_pages_range(struct vm_area_struct *vma,
unsigned long start, unsigned long end)
{
- vma->vm_flags &= ~(VM_LOCKED | VM_LOCKONFAULT);
+ vma->vm_flags &= VM_LOCKED_CLEAR_MASK;
while (start < end) {
struct page *page = NULL;
diff -puN mm/mmap.c~mm-introduce-vm_lockonfault-v9 mm/mmap.c
--- a/mm/mmap.c~mm-introduce-vm_lockonfault-v9
+++ a/mm/mmap.c
@@ -1670,7 +1670,7 @@ out:
vma == get_gate_vma(current->mm)))
mm->locked_vm += (len >> PAGE_SHIFT);
else
- vma->vm_flags &= ~(VM_LOCKED | VM_LOCKONFAULT);
+ vma->vm_flags &= VM_LOCKED_CLEAR_MASK;
}
if (file)
diff -puN mm/rmap.c~mm-introduce-vm_lockonfault-v9 mm/rmap.c
--- a/mm/rmap.c~mm-introduce-vm_lockonfault-v9
+++ a/mm/rmap.c
@@ -848,8 +848,7 @@ static int page_referenced_one(struct pa
if (vma->vm_flags & VM_LOCKED) {
spin_unlock(ptl);
- pra->vm_flags |=
- (vma->vm_flags & (VM_LOCKED | VM_LOCKONFAULT));
+ pra->vm_flags |= VM_LOCKED;
return SWAP_FAIL; /* To break the loop */
}
@@ -870,8 +869,7 @@ static int page_referenced_one(struct pa
if (vma->vm_flags & VM_LOCKED) {
pte_unmap_unlock(pte, ptl);
- pra->vm_flags |=
- (vma->vm_flags & (VM_LOCKED | VM_LOCKONFAULT));
+ pra->vm_flags |= VM_LOCKED;
return SWAP_FAIL; /* To break the loop */
}
_
Patches currently in -mm which might be from emunson@xxxxxxxxxx are
mm-mlock-refactor-mlock-munlock-and-munlockall-code.patch
mm-mlock-add-new-mlock-system-call.patch
mm-introduce-vm_lockonfault.patch
mm-introduce-vm_lockonfault-v9.patch
mm-mlock-add-mlock-flags-to-enable-vm_lockonfault-usage.patch
mm-mlock-add-mlock-flags-to-enable-vm_lockonfault-usage-v9.patch
selftests-vm-add-tests-for-lock-on-fault.patch
selftests-vm-add-tests-for-lock-on-fault-v9.patch
mips-add-entry-for-new-mlock2-syscall.patch
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