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| author | Dongli Zhang <dongli.zhang@oracle.com> | 2021-04-08 22:53:16 -0700 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2021-08-10 18:31:32 +0200 |
| commit | ebca71a8c96f0af2ba482489ecc64d88979cd825 (patch) | |
| tree | d125a5ac0533fa2a3a70adad3210598a8b1c8c77 /kernel/smp.c | |
| parent | 1782dc87b2edcf3a6c350ead748a8941b5835975 (diff) | |
| download | lwn-ebca71a8c96f0af2ba482489ecc64d88979cd825.tar.gz lwn-ebca71a8c96f0af2ba482489ecc64d88979cd825.zip | |
cpu/hotplug: Add debug printks for hotplug callback failures
CPU hotplug callbacks can fail and cause a rollback to the previous
state. These failures are silent and therefore hard to debug.
Add pr_debug() to the up and down paths which provide information about the
error code, the CPU and the failed state. The debug printks can be enabled
via kernel command line or sysfs.
[ tglx: Adopt to current mainline, massage printk and changelog ]
Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Qais Yousef <qais.yousef@arm.com>
Link: https://lore.kernel.org/r/20210409055316.1709-1-dongli.zhang@oracle.com
Diffstat (limited to 'kernel/smp.c')
0 files changed, 0 insertions, 0 deletions