Hi Alexandru,
At 12/28/2017 10:51 AM, Alexandru Chirvasitu wrote:
Ah, of course. Attached is the output of `journalctl --boot=-1` after
booting, getting locked up, and then rebooting a good kernel.
For the Hard lockups on both CPUs after login:
Please try the patch in the attachment by
git am ./0001-x86-vector-Replace-the-raw_spin_lock-with-raw_spin_l.patch
or
patch -p1 <
./0001-x86-vector-Replace-the-raw_spin_lock-with-raw_spin_l.patch
Slightly different version of 4.15-rc5; this one has both patches
applied, yours and Linus' for kexec, but the latter shouldn't make a
difference.
---
You'll see another trace in there that's been bugging me, about W=X
checking. I'm not qualified to judge how related they are, but during
these past few days I've compiled and tested many kernels, and many of
them have exhibited the W+X thing but*not* the lockups.
Yes, I found it, but I am not familiar with it and have no idea.
Thanks,
dou.
---------------------8<--------------------------------------------
>From 57d8543ea4dcf2a53b1c37757da12866a52aaf57 Mon Sep 17 00:00:00 2001
From: Dou Liyang <douly.fnst@xxxxxxxxxxxxxx>
Date: Thu, 28 Dec 2017 16:20:48 +0800
Subject: [PATCH] x86/vector: Replace the raw_spin_lock() with
raw_spin_lock_irqsave()
Signed-off-by: Dou Liyang <douly.fnst@xxxxxxxxxxxxxx>
---
arch/x86/kernel/apic/vector.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c
index 750449152b04..a43ca26d5dfd 100644
--- a/arch/x86/kernel/apic/vector.c
+++ b/arch/x86/kernel/apic/vector.c
@@ -726,6 +726,7 @@ static int apic_set_affinity(struct irq_data *irqd,
const struct cpumask *dest, bool force)
{
struct apic_chip_data *apicd = apic_chip_data(irqd);
+ unsigned long flags;
int err;
/*
@@ -740,13 +741,13 @@ static int apic_set_affinity(struct irq_data *irqd,
(apicd->is_managed || apicd->can_reserve))
return IRQ_SET_MASK_OK;
- raw_spin_lock(&vector_lock);
+ raw_spin_lock_irqsave(&vector_lock, flags);
cpumask_and(vector_searchmask, dest, cpu_online_mask);
if (irqd_affinity_is_managed(irqd))
err = assign_managed_vector(irqd, vector_searchmask);
else
err = assign_vector_locked(irqd, vector_searchmask);
- raw_spin_unlock(&vector_lock);
+ raw_spin_unlock_irqrestore(&vector_lock, flags);
return err ? err : IRQ_SET_MASK_OK;
}
--
2.14.3
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