[PATCH 16/16] arm64: kdump: relax BUG_ON() if more than one cpus are still active
From: geoff@infradead.org (Geoff Levand)
Date: 2015-10-19 23:38:54
Also in:
kexec
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
From: AKASHI Takahiro <redacted> We should try best in case of kdump. So even if not all secondary cpus have shut down, we do kdump anyway. --- arch/arm64/kernel/machine_kexec.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/kernel/machine_kexec.c b/arch/arm64/kernel/machine_kexec.c
index f315ee4..157c29b 100644
--- a/arch/arm64/kernel/machine_kexec.c
+++ b/arch/arm64/kernel/machine_kexec.c@@ -139,7 +139,12 @@ void machine_kexec(struct kimage *image) phys_addr_t reboot_code_buffer_phys; void *reboot_code_buffer; - BUG_ON(num_online_cpus() > 1); + if (num_online_cpus() > 1) { + if (in_crash_kexec) + pr_warn("*\n* kdump might fail because %d cpus are still online\n*\n", num_online_cpus()); + else + BUG(); + } kimage_head = image->head;
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2.5.0