[PATCH v4 25/33] mm: add FAULT_FLAG_VMA_LOCK flag
From: Suren Baghdasaryan <surenb@google.com>
Date: 2023-02-27 17:38:54
Also in:
linux-mm, lkml
Subsystem:
memory management - core, the rest · Maintainers:
Andrew Morton, David Hildenbrand, Linus Torvalds
Add a new flag to distinguish page faults handled under protection of per-vma lock. Signed-off-by: Suren Baghdasaryan <surenb@google.com> Reviewed-by: Laurent Dufour <redacted> --- include/linux/mm.h | 3 ++- include/linux/mm_types.h | 1 + 2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 46d2db743b1a..d07ac923333f 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h@@ -478,7 +478,8 @@ static inline bool fault_flag_allow_retry_first(enum fault_flag flags) { FAULT_FLAG_USER, "USER" }, \ { FAULT_FLAG_REMOTE, "REMOTE" }, \ { FAULT_FLAG_INSTRUCTION, "INSTRUCTION" }, \ - { FAULT_FLAG_INTERRUPTIBLE, "INTERRUPTIBLE" } + { FAULT_FLAG_INTERRUPTIBLE, "INTERRUPTIBLE" }, \ + { FAULT_FLAG_VMA_LOCK, "VMA_LOCK" } /* * vm_fault is filled by the pagefault handler and passed to the vma's
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 45a219d33c6b..6768533a6b7c 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h@@ -1097,6 +1097,7 @@ enum fault_flag { FAULT_FLAG_INTERRUPTIBLE = 1 << 9, FAULT_FLAG_UNSHARE = 1 << 10, FAULT_FLAG_ORIG_PTE_VALID = 1 << 11, + FAULT_FLAG_VMA_LOCK = 1 << 12, }; typedef unsigned int __bitwise zap_flags_t;
--
2.39.2.722.g9855ee24e9-goog