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FROMLIST: mm: percpu: increase PERCPU_MODULE_RESERVE to avoid allocation failure

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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 <gaoxu2@honor.com>

Bug: 412277993
Link: https://lore.kernel.org/all/bcfb90b2cecf43d7a0760ebaddde10d8@honor.com/
Change-Id: I774f8a7c4dd4340811bf5d17cb68740496991447
Signed-off-by: yipeng xiang <yipengxiang@honor.corp-partner.google.com>
This commit is contained in:
gao xu
2025-04-22 19:07:49 +08:00
committed by Treehugger Robot
parent a707a457ef
commit 73e2a7d397
1 changed files with 1 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/linux/percpu.h
+1 -1
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@@ -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