diff --git a/llvm/docs/ScudoHardenedAllocator.rst b/llvm/docs/ScudoHardenedAllocator.rst
--- a/llvm/docs/ScudoHardenedAllocator.rst
+++ b/llvm/docs/ScudoHardenedAllocator.rst
@@ -267,6 +267,9 @@
 +---------------------------+-------------------------------------------------------+
 | M_PURGE                   | Forces immediate memory reclaiming (value is unused). |
 +---------------------------+-------------------------------------------------------+
+| M_PURGE_ALL               | Same as M_PURGE but will force release everything     |
+|                           | regarless of the time it takes.                       |
++---------------------------+-------------------------------------------------------+
 | M_MEMTAG_TUNING           | Tunes the allocator's choice of memory tags to make   |
 |                           | it more likely that a certain class of memory errors  |
 |                           | will be detected. The value argument should be one of |