From 73e2a7d3979e26b61b2ba5cde04b42cd322a8ed8 Mon Sep 17 00:00:00 2001 From: gao xu Date: Tue, 22 Apr 2025 19:07:49 +0800 Subject: [PATCH] FROMLIST: mm: percpu: increase PERCPU_MODULE_RESERVE to avoid allocation failure In android16-6.12, enabling CONFIG_MEM_ALLOC_PROFILING causes some modules to fail to load during boot because of failed percpu memory allocation. [811:modprobe]percpu: allocation failed, size=5200 align=8 atomic=0, alloc from reserved chunk failed [811:modprobe]Call trace: [811:modprobe] dump_backtrace+0xfc/0x17c [811:modprobe] show_stack+0x18/0x28 [811:modprobe] dump_stack_lvl+0x40/0xc0 [811:modprobe] dump_stack+0x18/0x24 [811:modprobe] pcpu_alloc_noprof+0x96c/0xb58 [811:modprobe] percpu_modalloc+0x50/0xec [811:modprobe] load_module+0x1158/0x153c [811:modprobe] __arm64_sys_finit_module+0x23c/0x340 [811:modprobe] invoke_syscall+0x58/0x10c [811:modprobe] el0_svc_common+0xa8/0xdc [811:modprobe] do_el0_svc+0x1c/0x28 [811:modprobe] el0_svc+0x40/0x90 [811:modprobe] el0t_64_sync_handler+0x70/0xbc [811:modprobe] el0t_64_sync+0x1a8/0x1ac [811:modprobe]ipam: Could not allocate 5200 bytes percpu data Increase PERCPU_MODULE_RESERVE to resolve this issue. Signed-off-by: gao xu Bug: 412277993 Link: https://lore.kernel.org/all/bcfb90b2cecf43d7a0760ebaddde10d8@honor.com/ Change-Id: I774f8a7c4dd4340811bf5d17cb68740496991447 Signed-off-by: yipeng xiang --- include/linux/percpu.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/percpu.h b/include/linux/percpu.h index 52b5ea663b9f..765c7f56271d 100644 --- a/include/linux/percpu.h +++ b/include/linux/percpu.h @@ -16,7 +16,7 @@ /* enough to cover all DEFINE_PER_CPUs in modules */ #ifdef CONFIG_MODULES #ifdef CONFIG_MEM_ALLOC_PROFILING -#define PERCPU_MODULE_RESERVE (8 << 13) +#define PERCPU_MODULE_RESERVE (8 << 14) #else #define PERCPU_MODULE_RESERVE (8 << 10) #endif