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From: Michael Ellerman <mpe@ellerman.id.au>
To: linuxppc-dev@ozlabs.org
Subject: [PATCH] powerpc/configs/64s: Enable CONFIG_PRINTK_CALLER
Date: Wed, 20 May 2020 22:12:57 +1000	[thread overview]
Message-ID: <20200520121257.961112-1-mpe@ellerman.id.au> (raw)

This adds the CPU or thread number to printk messages. This helps a
lot when deciphering concurrent oopses that have been interleaved.

Example output, of PID1 (T1) triggering a warning:

  [    1.581678][    T1] WARNING: CPU: 0 PID: 1 at crypto/rsa-pkcs1pad.c:539 pkcs1pad_verify+0x38/0x140
  [    1.581681][    T1] Modules linked in:
  [    1.581693][    T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.5.0-rc5-gcc-8.2.0-00121-gf84c2e595927-dirty #1515
  [    1.581700][    T1] NIP:  c000000000207d64 LR: c000000000207d3c CTR: c000000000207d2c
  [    1.581708][    T1] REGS: c0000000fd2e7560 TRAP: 0700   Not tainted  (5.5.0-rc5-gcc-8.2.0-00121-gf84c2e595927-dirty)
  [    1.581712][    T1] MSR:  9000000000029033 <SF,HV,EE,ME,IR,DR,RI,LE>  CR: 44000222  XER: 00040000

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
 arch/powerpc/configs/powernv_defconfig | 1 +
 arch/powerpc/configs/ppc64_defconfig   | 1 +
 arch/powerpc/configs/pseries_defconfig | 1 +
 3 files changed, 3 insertions(+)

diff --git a/arch/powerpc/configs/powernv_defconfig b/arch/powerpc/configs/powernv_defconfig
index df8bdbaa5d8f..2de9aadf0f50 100644
--- a/arch/powerpc/configs/powernv_defconfig
+++ b/arch/powerpc/configs/powernv_defconfig
@@ -347,3 +347,4 @@ CONFIG_KVM_BOOK3S_64=m
 CONFIG_KVM_BOOK3S_64_HV=m
 CONFIG_VHOST_NET=m
 CONFIG_PRINTK_TIME=y
+CONFIG_PRINTK_CALLER=y
diff --git a/arch/powerpc/configs/ppc64_defconfig b/arch/powerpc/configs/ppc64_defconfig
index bae8170d7401..57142a648ebd 100644
--- a/arch/powerpc/configs/ppc64_defconfig
+++ b/arch/powerpc/configs/ppc64_defconfig
@@ -358,6 +358,7 @@ CONFIG_CRYPTO_DEV_NX=y
 CONFIG_CRYPTO_DEV_NX_ENCRYPT=m
 CONFIG_CRYPTO_DEV_VMX=y
 CONFIG_PRINTK_TIME=y
+CONFIG_PRINTK_CALLER=y
 CONFIG_MAGIC_SYSRQ=y
 CONFIG_DEBUG_KERNEL=y
 CONFIG_DEBUG_STACK_USAGE=y
diff --git a/arch/powerpc/configs/pseries_defconfig b/arch/powerpc/configs/pseries_defconfig
index 0bea4d3ffb85..dfa4a726333b 100644
--- a/arch/powerpc/configs/pseries_defconfig
+++ b/arch/powerpc/configs/pseries_defconfig
@@ -322,3 +322,4 @@ CONFIG_KVM_BOOK3S_64=m
 CONFIG_KVM_BOOK3S_64_HV=m
 CONFIG_VHOST_NET=m
 CONFIG_PRINTK_TIME=y
+CONFIG_PRINTK_CALLER=y
-- 
2.25.1


             reply	other threads:[~2020-05-20 12:14 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-20 12:12 Michael Ellerman [this message]
2020-06-09  5:29 ` [PATCH] powerpc/configs/64s: Enable CONFIG_PRINTK_CALLER Michael Ellerman

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