--- zzzz-none-000/linux-4.9.279/arch/x86/mm/pgtable_32.c	2021-08-08 06:38:54.000000000 +0000
+++ puma7-atom-6591-750/linux-4.9.279/arch/x86/mm/pgtable_32.c	2023-02-08 11:43:42.000000000 +0000
@@ -17,7 +17,9 @@
 #include <asm/tlbflush.h>
 #include <asm/io.h>
 
-unsigned int __VMALLOC_RESERVE = 128 << 20;
+/* AVM: default vmalloc reservation is increased 128 → 512MB, cp. JZ-38453 */
+/* AVM: default vmalloc reservation is decreased 512 → 256MB, cp. JZ-42707 */
+unsigned int __VMALLOC_RESERVE = 256 << 20;
 
 /*
  * Associate a virtual page frame with a given physical page frame 
@@ -65,6 +67,8 @@
  * vmalloc=size forces the vmalloc area to be exactly 'size'
  * bytes. This can be used to increase (or decrease) the
  * vmalloc area - the default is 128m.
+ *
+ * AVM: default vmalloc reservation increased to 512MB, cp. JZ-38453
  */
 static int __init parse_vmalloc(char *arg)
 {