allocator: Ignore madvise ENOSYS error

Support kernels builts without CONFIG_ADVISE_SYSCALLS on small embedded devices.
Revert "Disable PartitionAlloc for old device builds"
2024-11-24 06:16:30 +03:00 · 2022-11-12 15:13:24 +08:00 · 2022-11-12 15:13:17 +08:00 · 2022-11-12 14:29:20 +08:00
1 changed files with 6 additions and 1 deletions
--- a/src/base/allocator/partition_allocator/page_allocator_internals_posix.h
+++ b/src/base/allocator/partition_allocator/page_allocator_internals_posix.h
@ -361,7 +361,12 @@ void DiscardSystemPagesInternal(uintptr_t address, size_t length) {
  // performance benefits unclear.
  //
  // Therefore, we just do the simple thing: MADV_DONTNEED.
-  PA_PCHECK(0 == madvise(ptr, length, MADV_DONTNEED));
+  int ret = madvise(ptr, length, MADV_DONTNEED);
+  if (ret && errno == ENOSYS) {
+    // Ignores when the kernel is built without CONFIG_ADVISE_SYSCALLS
+    return;
+  }
+  PA_PCHECK(ret == 0);
 #endif
 }
Author	SHA1	Message	Date
klzgrad	5edebbfffb	allocator: Ignore madvise ENOSYS error Support kernels builts without CONFIG_ADVISE_SYSCALLS on small embedded devices.	2022-11-12 15:13:24 +08:00
klzgrad	f9f98eedd9	Revert "Disable PartitionAlloc for old device builds" This reverts commit `15fe90088c`.	2022-11-12 15:13:17 +08:00
klzgrad	15fe90088c	Disable PartitionAlloc for old device builds	2022-11-12 14:29:20 +08:00