Re: [bisected] ext4 corruption on parisc since 6.12

[John David Anglin]

On 2024-12-02 2:45 p.m., John David Anglin wrote:
> I also have in config:
> CONFIG_HAVE_UNSTABLE_SCHED_CLOCK=y
Here is a comment from <https://www.kernel.org/doc/Documentation/timers/timekeeping.txt>:

On SMP systems, it is crucial for performance that sched_clock() can be called
independently on each CPU without any synchronization performance hits.
Some hardware (such as the x86 TSC) will cause the sched_clock() function to
drift between the CPUs on the system. The kernel can work around this by
enabling the CONFIG_HAVE_UNSTABLE_SCHED_CLOCK option. This is another aspect
that makes sched_clock() different from the ordinary clock source.

Dave

--
John David Anglin  dave.anglin@xxxxxxxx