* + mm-remove-vm_fault_write.patch added to mm-unstable branch
@ 2022-10-18 0:46 Andrew Morton
0 siblings, 0 replies; 2+ messages in thread
From: Andrew Morton @ 2022-10-18 0:46 UTC (permalink / raw)
To: mm-commits, willy, vbabka, shuah, peterx, jhubbard, jgg, hughd,
aarcange, david, akpm
The patch titled
Subject: mm: remove VM_FAULT_WRITE
has been added to the -mm mm-unstable branch. Its filename is
mm-remove-vm_fault_write.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-remove-vm_fault_write.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
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c) Ideally: find the original patch on the mailing list and do a
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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: David Hildenbrand <david@redhat.com>
Subject: mm: remove VM_FAULT_WRITE
Date: Fri, 30 Sep 2022 16:19:27 +0200
All users -- GUP and KSM -- are gone, let's just remove it.
Link: https://lkml.kernel.org/r/20220930141931.174362-4-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Acked-by: Peter Xu <peterx@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
include/linux/mm_types.h | 3 ---
mm/huge_memory.c | 2 +-
mm/memory.c | 9 ++++-----
3 files changed, 5 insertions(+), 9 deletions(-)
--- a/include/linux/mm_types.h~mm-remove-vm_fault_write
+++ a/include/linux/mm_types.h
@@ -861,7 +861,6 @@ typedef __bitwise unsigned int vm_fault_
* @VM_FAULT_OOM: Out Of Memory
* @VM_FAULT_SIGBUS: Bad access
* @VM_FAULT_MAJOR: Page read from storage
- * @VM_FAULT_WRITE: Special case for get_user_pages
* @VM_FAULT_HWPOISON: Hit poisoned small page
* @VM_FAULT_HWPOISON_LARGE: Hit poisoned large page. Index encoded
* in upper bits
@@ -882,7 +881,6 @@ enum vm_fault_reason {
VM_FAULT_OOM = (__force vm_fault_t)0x000001,
VM_FAULT_SIGBUS = (__force vm_fault_t)0x000002,
VM_FAULT_MAJOR = (__force vm_fault_t)0x000004,
- VM_FAULT_WRITE = (__force vm_fault_t)0x000008,
VM_FAULT_HWPOISON = (__force vm_fault_t)0x000010,
VM_FAULT_HWPOISON_LARGE = (__force vm_fault_t)0x000020,
VM_FAULT_SIGSEGV = (__force vm_fault_t)0x000040,
@@ -908,7 +906,6 @@ enum vm_fault_reason {
{ (__force unsigned int) VM_FAULT_OOM, "OOM" }, \
{ (__force unsigned int) VM_FAULT_SIGBUS, "SIGBUS" }, \
{ (__force unsigned int) VM_FAULT_MAJOR, "MAJOR" }, \
- { (__force unsigned int) VM_FAULT_WRITE, "WRITE" }, \
{ (__force unsigned int) VM_FAULT_HWPOISON, "HWPOISON" }, \
{ (__force unsigned int) VM_FAULT_HWPOISON_LARGE, "HWPOISON_LARGE" }, \
{ (__force unsigned int) VM_FAULT_SIGSEGV, "SIGSEGV" }, \
--- a/mm/huge_memory.c~mm-remove-vm_fault_write
+++ a/mm/huge_memory.c
@@ -1333,7 +1333,7 @@ reuse:
if (pmdp_set_access_flags(vma, haddr, vmf->pmd, entry, 1))
update_mmu_cache_pmd(vma, vmf->address, vmf->pmd);
spin_unlock(vmf->ptl);
- return VM_FAULT_WRITE;
+ return 0;
}
unlock_fallback:
--- a/mm/memory.c~mm-remove-vm_fault_write
+++ a/mm/memory.c
@@ -3242,7 +3242,7 @@ static vm_fault_t wp_page_copy(struct vm
}
delayacct_wpcopy_end();
- return (page_copied && !unshare) ? VM_FAULT_WRITE : 0;
+ return 0;
oom_free_new:
put_page(new_page);
oom:
@@ -3306,14 +3306,14 @@ static vm_fault_t wp_pfn_shared(struct v
return finish_mkwrite_fault(vmf);
}
wp_page_reuse(vmf);
- return VM_FAULT_WRITE;
+ return 0;
}
static vm_fault_t wp_page_shared(struct vm_fault *vmf)
__releases(vmf->ptl)
{
struct vm_area_struct *vma = vmf->vma;
- vm_fault_t ret = VM_FAULT_WRITE;
+ vm_fault_t ret = 0;
get_page(vmf->page);
@@ -3464,7 +3464,7 @@ reuse:
return 0;
}
wp_page_reuse(vmf);
- return VM_FAULT_WRITE;
+ return 0;
} else if (unshare) {
/* No anonymous page -> nothing to do. */
pte_unmap_unlock(vmf->pte, vmf->ptl);
@@ -3983,7 +3983,6 @@ vm_fault_t do_swap_page(struct vm_fault
if (vmf->flags & FAULT_FLAG_WRITE) {
pte = maybe_mkwrite(pte_mkdirty(pte), vma);
vmf->flags &= ~FAULT_FLAG_WRITE;
- ret |= VM_FAULT_WRITE;
}
rmap_flags |= RMAP_EXCLUSIVE;
}
_
Patches currently in -mm which might be from david@redhat.com are
selftests-vm-add-test-to-measure-madv_unmergeable-performance.patch
mm-ksm-simplify-break_ksm-to-not-rely-on-vm_fault_write.patch
mm-remove-vm_fault_write.patch
mm-ksm-fix-ksm-cow-breaking-with-userfaultfd-wp-via-fault_flag_unshare.patch
mm-pagewalk-add-walk_page_range_vma.patch
mm-ksm-convert-break_ksm-to-use-walk_page_range_vma.patch
mm-gup-remove-foll_migration.patch
^ permalink raw reply [flat|nested] 2+ messages in thread
* + mm-remove-vm_fault_write.patch added to mm-unstable branch
@ 2022-10-21 20:01 Andrew Morton
0 siblings, 0 replies; 2+ messages in thread
From: Andrew Morton @ 2022-10-21 20:01 UTC (permalink / raw)
To: mm-commits, willy, vbabka, shuah, peterx, jhubbard, jgg, hughd,
aarcange, david, akpm
The patch titled
Subject: mm: remove VM_FAULT_WRITE
has been added to the -mm mm-unstable branch. Its filename is
mm-remove-vm_fault_write.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-remove-vm_fault_write.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: David Hildenbrand <david@redhat.com>
Subject: mm: remove VM_FAULT_WRITE
Date: Fri, 21 Oct 2022 12:11:35 +0200
All users -- GUP and KSM -- are gone, let's just remove it.
Link: https://lkml.kernel.org/r/20221021101141.84170-4-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Acked-by: Peter Xu <peterx@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
include/linux/mm_types.h | 3 ---
mm/huge_memory.c | 2 +-
mm/memory.c | 9 ++++-----
3 files changed, 5 insertions(+), 9 deletions(-)
--- a/include/linux/mm_types.h~mm-remove-vm_fault_write
+++ a/include/linux/mm_types.h
@@ -861,7 +861,6 @@ typedef __bitwise unsigned int vm_fault_
* @VM_FAULT_OOM: Out Of Memory
* @VM_FAULT_SIGBUS: Bad access
* @VM_FAULT_MAJOR: Page read from storage
- * @VM_FAULT_WRITE: Special case for get_user_pages
* @VM_FAULT_HWPOISON: Hit poisoned small page
* @VM_FAULT_HWPOISON_LARGE: Hit poisoned large page. Index encoded
* in upper bits
@@ -882,7 +881,6 @@ enum vm_fault_reason {
VM_FAULT_OOM = (__force vm_fault_t)0x000001,
VM_FAULT_SIGBUS = (__force vm_fault_t)0x000002,
VM_FAULT_MAJOR = (__force vm_fault_t)0x000004,
- VM_FAULT_WRITE = (__force vm_fault_t)0x000008,
VM_FAULT_HWPOISON = (__force vm_fault_t)0x000010,
VM_FAULT_HWPOISON_LARGE = (__force vm_fault_t)0x000020,
VM_FAULT_SIGSEGV = (__force vm_fault_t)0x000040,
@@ -908,7 +906,6 @@ enum vm_fault_reason {
{ (__force unsigned int) VM_FAULT_OOM, "OOM" }, \
{ (__force unsigned int) VM_FAULT_SIGBUS, "SIGBUS" }, \
{ (__force unsigned int) VM_FAULT_MAJOR, "MAJOR" }, \
- { (__force unsigned int) VM_FAULT_WRITE, "WRITE" }, \
{ (__force unsigned int) VM_FAULT_HWPOISON, "HWPOISON" }, \
{ (__force unsigned int) VM_FAULT_HWPOISON_LARGE, "HWPOISON_LARGE" }, \
{ (__force unsigned int) VM_FAULT_SIGSEGV, "SIGSEGV" }, \
--- a/mm/huge_memory.c~mm-remove-vm_fault_write
+++ a/mm/huge_memory.c
@@ -1333,7 +1333,7 @@ reuse:
if (pmdp_set_access_flags(vma, haddr, vmf->pmd, entry, 1))
update_mmu_cache_pmd(vma, vmf->address, vmf->pmd);
spin_unlock(vmf->ptl);
- return VM_FAULT_WRITE;
+ return 0;
}
unlock_fallback:
--- a/mm/memory.c~mm-remove-vm_fault_write
+++ a/mm/memory.c
@@ -3242,7 +3242,7 @@ static vm_fault_t wp_page_copy(struct vm
}
delayacct_wpcopy_end();
- return (page_copied && !unshare) ? VM_FAULT_WRITE : 0;
+ return 0;
oom_free_new:
put_page(new_page);
oom:
@@ -3306,14 +3306,14 @@ static vm_fault_t wp_pfn_shared(struct v
return finish_mkwrite_fault(vmf);
}
wp_page_reuse(vmf);
- return VM_FAULT_WRITE;
+ return 0;
}
static vm_fault_t wp_page_shared(struct vm_fault *vmf)
__releases(vmf->ptl)
{
struct vm_area_struct *vma = vmf->vma;
- vm_fault_t ret = VM_FAULT_WRITE;
+ vm_fault_t ret = 0;
get_page(vmf->page);
@@ -3464,7 +3464,7 @@ reuse:
return 0;
}
wp_page_reuse(vmf);
- return VM_FAULT_WRITE;
+ return 0;
} else if (unshare) {
/* No anonymous page -> nothing to do. */
pte_unmap_unlock(vmf->pte, vmf->ptl);
@@ -3983,7 +3983,6 @@ vm_fault_t do_swap_page(struct vm_fault
if (vmf->flags & FAULT_FLAG_WRITE) {
pte = maybe_mkwrite(pte_mkdirty(pte), vma);
vmf->flags &= ~FAULT_FLAG_WRITE;
- ret |= VM_FAULT_WRITE;
}
rmap_flags |= RMAP_EXCLUSIVE;
}
_
Patches currently in -mm which might be from david@redhat.com are
selftests-vm-anon_cow-test-cow-handling-of-anonymous-memory.patch
selftests-vm-factor-out-pagemap_is_populated-into-vm_util.patch
selftests-vm-anon_cow-thp-tests.patch
selftests-vm-anon_cow-hugetlb-tests.patch
selftests-vm-anon_cow-add-liburing-test-cases.patch
mm-gup_test-start-stop-read-functionality-for-pin-longterm-test.patch
mm-gup_test-start-stop-read-functionality-for-pin-longterm-test-fix.patch
selftests-vm-anon_cow-add-r-o-longterm-tests-via-gup_test.patch
selftests-vm-add-ksm-unmerge-tests.patch
mm-pagewalk-dont-trigger-test_walk-in-walk_page_vma.patch
selftests-vm-add-test-to-measure-madv_unmergeable-performance.patch
mm-ksm-simplify-break_ksm-to-not-rely-on-vm_fault_write.patch
mm-remove-vm_fault_write.patch
mm-ksm-fix-ksm-cow-breaking-with-userfaultfd-wp-via-fault_flag_unshare.patch
mm-pagewalk-add-walk_page_range_vma.patch
mm-ksm-convert-break_ksm-to-use-walk_page_range_vma.patch
mm-gup-remove-foll_migration.patch
^ permalink raw reply [flat|nested] 2+ messages in thread
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