From: Shrikanth Hegde <sshegde@linux.ibm.com>
To: mpe@ellerman.id.au, linuxppc-dev@lists.ozlabs.org
Cc: sshegde@linux.ibm.com, npiggin@gmail.com,
christophe.leroy@csgroup.eu, maddy@linux.ibm.com,
bigeasy@linutronix.de, ankur.a.arora@oracle.com,
linux-kernel@vger.kernel.org, mark.rutland@arm.com,
vschneid@redhat.com, peterz@infradead.org
Subject: [PATCH 3/3] powerpc: print right preemption model in die
Date: Mon, 25 Nov 2024 09:52:12 +0530 [thread overview]
Message-ID: <20241125042212.1522315-4-sshegde@linux.ibm.com> (raw)
In-Reply-To: <20241125042212.1522315-1-sshegde@linux.ibm.com>
Preemption models can change at runtime with dynamic preemption in
place. So need to use the right methods instead of relying on
CONFIG_PREEMPT to decide whether its full preemption or not.
While there, fix it to print preemption model correctly.
Signed-off-by: Shrikanth Hegde <sshegde@linux.ibm.com>
---
arch/powerpc/kernel/traps.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index edf5cabe5dfd..2556fa8ec019 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -266,7 +266,11 @@ static int __die(const char *str, struct pt_regs *regs, long err)
printk("%s PAGE_SIZE=%luK%s%s%s%s%s%s %s\n",
IS_ENABLED(CONFIG_CPU_LITTLE_ENDIAN) ? "LE" : "BE",
PAGE_SIZE / 1024, get_mmu_str(),
- IS_ENABLED(CONFIG_PREEMPT) ? " PREEMPT" : "",
+ preempt_model_none() ? "none" :
+ preempt_model_voluntary() ? "voluntary" :
+ preempt_model_full() ? "full" :
+ preempt_model_lazy() ? "lazy" :
+ "",
IS_ENABLED(CONFIG_SMP) ? " SMP" : "",
IS_ENABLED(CONFIG_SMP) ? (" NR_CPUS=" __stringify(NR_CPUS)) : "",
debug_pagealloc_enabled() ? " DEBUG_PAGEALLOC" : "",
--
2.39.3
next prev parent reply other threads:[~2024-11-25 4:23 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-11-25 4:22 [PATCH 0/3] powerpc: Enable dynamic preemption Shrikanth Hegde
2024-11-25 4:22 ` [PATCH 1/3] powerpc: copy preempt.h into arch/include/asm Shrikanth Hegde
2024-11-26 10:49 ` Christophe Leroy
2024-11-27 6:37 ` Christophe Leroy
2024-12-02 14:05 ` Shrikanth Hegde
2024-12-02 18:17 ` Christophe Leroy
2024-12-03 14:00 ` Shrikanth Hegde
2024-12-03 19:47 ` Christophe Leroy
2024-11-25 4:22 ` [PATCH 2/3] powerpc: support dynamic preemption Shrikanth Hegde
2024-11-26 10:48 ` Christophe Leroy
2024-11-26 11:15 ` Shrikanth Hegde
2024-11-27 6:28 ` Christophe Leroy
2024-11-27 6:44 ` Christophe Leroy
2024-12-01 19:45 ` Shrikanth Hegde
2024-12-03 19:53 ` Christophe Leroy
2024-11-25 4:22 ` Shrikanth Hegde [this message]
2024-12-04 6:44 ` [PATCH 3/3] powerpc: print right preemption model in die Christophe Leroy
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