Messages in this thread Patch in this message | | | From | Huang Shijie <> | Subject | [PATCH] crash_core: export vmemmap when CONFIG_SPARSEMEM_VMEMMAP is enabled | Date | Mon, 27 Nov 2023 10:07:27 +0800 |
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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.
Signed-off-by: Huang Shijie <shijie@os.amperecomputing.com> --- kernel/crash_core.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/kernel/crash_core.c b/kernel/crash_core.c index efe87d501c8c..9653c4177191 100644 --- a/kernel/crash_core.c +++ b/kernel/crash_core.c @@ -765,6 +765,9 @@ 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); -- 2.40.1
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