diff options
| author | Huang Shijie <shijie@os.amperecomputing.com> | 2024-02-27 09:49:52 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-03-04 17:01:27 -0800 |
| commit | d3246b6ee42a155ab57e936841028fff3d7d98b4 (patch) | |
| tree | 16808a2e60754beaeff72b5a42558aa8b5f8ae80 /kernel/vmcore_info.c | |
| parent | 8f8cd6c0a43ed637e620bbe45a8d0e0c2f4d5130 (diff) | |
crash_core: export vmemmap when CONFIG_SPARSEMEM_VMEMMAP is enabled
In memory_model.h, if CONFIG_SPARSEMEM_VMEMMAP is configed, kernel will
use vmemmap to do the __pfn_to_page/page_to_pfn, and kernel will not use
the "classic sparse" to do the __pfn_to_page/page_to_pfn.
So export the vmemmap when CONFIG_SPARSEMEM_VMEMMAP is configed. This
makes the user applications (crash, etc) get faster
pfn_to_page/page_to_pfn operations too.
Link: https://lkml.kernel.org/r/20240227014952.3184-1-shijie@os.amperecomputing.com
Signed-off-by: Huang Shijie <shijie@os.amperecomputing.com>
Acked-by: Baoquan He <bhe@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Kazuhito Hagio <k-hagio-ab@nec.com>
Cc: Lianbo Jiang <lijiang@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'kernel/vmcore_info.c')
| -rw-r--r-- | kernel/vmcore_info.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/vmcore_info.c b/kernel/vmcore_info.c index 8f77e238a54f..f95516cd45bb 100644 --- a/kernel/vmcore_info.c +++ b/kernel/vmcore_info.c @@ -152,6 +152,9 @@ static int __init crash_save_vmcoreinfo_init(void) VMCOREINFO_SYMBOL(mem_map); VMCOREINFO_SYMBOL(contig_page_data); #endif +#ifdef CONFIG_SPARSEMEM_VMEMMAP + VMCOREINFO_SYMBOL_ARRAY(vmemmap); +#endif #ifdef CONFIG_SPARSEMEM VMCOREINFO_SYMBOL_ARRAY(mem_section); VMCOREINFO_LENGTH(mem_section, NR_SECTION_ROOTS); |