Re: [PATCH] MIPS: Fix cmdline "mem=" parameter parsing
Hi, Jiaxun On 04/20/2021 09:05 AM, Jiaxun Yang wrote: 在 2021/4/19 18:50, Youling Tang 写道: This problem may only occur on NUMA platforms. When machine start with the "mem=" parameter on Loongson64, it cannot boot. When parsing the "mem=" parameter, first remove all RAM, and then add memory through memblock_add(), which causes the newly added memory to be located on MAX_NUMNODES. The solution is to add the current "mem=" parameter range to the memory area of the corresponding node, instead of adding all of it to the MAX_NUMNODES node area. Get the node number corresponding to the "mem=" parameter range through pa_to_nid(), and then add it to the corresponding node through memblock_add_node(). Signed-off-by: Jinyang He Signed-off-by: Youling Tang --- arch/mips/kernel/setup.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c index 279be01..b86e241 100644 --- a/arch/mips/kernel/setup.c +++ b/arch/mips/kernel/setup.c @@ -359,7 +359,7 @@ static int __init early_parse_mem(char *p) if (*p == '@') start = memparse(p + 1, ); -memblock_add(start, size); +memblock_add_node(start, size, pa_to_nid(start)); pa_to_nid is not available for all platforms. Thanks for your correction. pa_to_nid() only has actual definitions in mach-ip27 and mach-loongson64 (only for NUMA platform). In arch/mips/include/asm/mmzone.h: #ifndef pa_to_nid #define pa_to_nid(addr) 0 #endif So only need #include to solve the "error: implicit declaration of function'pa_to_nid'" compilation error. Thanks, Youling Thanks. - Jiaxun return 0; }
Re: [PATCH] MIPS: Fix cmdline "mem=" parameter parsing
在 2021/4/19 18:50, Youling Tang 写道: This problem may only occur on NUMA platforms. When machine start with the "mem=" parameter on Loongson64, it cannot boot. When parsing the "mem=" parameter, first remove all RAM, and then add memory through memblock_add(), which causes the newly added memory to be located on MAX_NUMNODES. The solution is to add the current "mem=" parameter range to the memory area of the corresponding node, instead of adding all of it to the MAX_NUMNODES node area. Get the node number corresponding to the "mem=" parameter range through pa_to_nid(), and then add it to the corresponding node through memblock_add_node(). Signed-off-by: Jinyang He Signed-off-by: Youling Tang --- arch/mips/kernel/setup.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c index 279be01..b86e241 100644 --- a/arch/mips/kernel/setup.c +++ b/arch/mips/kernel/setup.c @@ -359,7 +359,7 @@ static int __init early_parse_mem(char *p) if (*p == '@') start = memparse(p + 1, ); - memblock_add(start, size); + memblock_add_node(start, size, pa_to_nid(start)); pa_to_nid is not available for all platforms. Thanks. - Jiaxun return 0; }
Re: [PATCH] MIPS: Fix cmdline "mem=" parameter parsing
Hi Youling,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on linus/master]
[also build test ERROR on v5.12-rc8 next-20210419]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url:
https://github.com/0day-ci/linux/commits/Youling-Tang/MIPS-Fix-cmdline-mem-parameter-parsing/20210419-185311
base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
bf05bf16c76bb44ab5156223e1e58e26dfe30a88
config: mips-allyesconfig (attached as .config)
compiler: mips-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget
https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O
~/bin/make.cross
chmod +x ~/bin/make.cross
#
https://github.com/0day-ci/linux/commit/c9cec6a7cf36ea04b1d8aca273a27e92007085e2
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review
Youling-Tang/MIPS-Fix-cmdline-mem-parameter-parsing/20210419-185311
git checkout c9cec6a7cf36ea04b1d8aca273a27e92007085e2
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1
ARCH=mips
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot
All errors (new ones prefixed by >>):
arch/mips/kernel/setup.c: In function 'early_parse_mem':
>> arch/mips/kernel/setup.c:362:33: error: implicit declaration of function
>> 'pa_to_nid'; did you mean 'page_to_nid'?
>> [-Werror=implicit-function-declaration]
362 | memblock_add_node(start, size, pa_to_nid(start));
| ^
| page_to_nid
cc1: some warnings being treated as errors
vim +362 arch/mips/kernel/setup.c
342
343 static int __init early_parse_mem(char *p)
344 {
345 phys_addr_t start, size;
346
347 /*
348 * If a user specifies memory size, we
349 * blow away any automatically generated
350 * size.
351 */
352 if (usermem == 0) {
353 usermem = 1;
354 memblock_remove(memblock_start_of_DRAM(),
355 memblock_end_of_DRAM() -
memblock_start_of_DRAM());
356 }
357 start = 0;
358 size = memparse(p, );
359 if (*p == '@')
360 start = memparse(p + 1, );
361
> 362 memblock_add_node(start, size, pa_to_nid(start));
363
364 return 0;
365 }
366 early_param("mem", early_parse_mem);
367
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org
.config.gz
Description: application/gzip
[PATCH] MIPS: Fix cmdline "mem=" parameter parsing
This problem may only occur on NUMA platforms. When machine start with the "mem=" parameter on Loongson64, it cannot boot. When parsing the "mem=" parameter, first remove all RAM, and then add memory through memblock_add(), which causes the newly added memory to be located on MAX_NUMNODES. The solution is to add the current "mem=" parameter range to the memory area of the corresponding node, instead of adding all of it to the MAX_NUMNODES node area. Get the node number corresponding to the "mem=" parameter range through pa_to_nid(), and then add it to the corresponding node through memblock_add_node(). Signed-off-by: Jinyang He Signed-off-by: Youling Tang --- arch/mips/kernel/setup.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c index 279be01..b86e241 100644 --- a/arch/mips/kernel/setup.c +++ b/arch/mips/kernel/setup.c @@ -359,7 +359,7 @@ static int __init early_parse_mem(char *p) if (*p == '@') start = memparse(p + 1, ); - memblock_add(start, size); + memblock_add_node(start, size, pa_to_nid(start)); return 0; } -- 2.1.0
