change in tcsh behavior

Mateusz Piotrowski 0mp at
Tue Jul 28 08:50:00 UTC 2020


On 7/28/20 1:06 AM, Robert Huff wrote:
> Mateusz Piotrowski writes:
>   > load: 0.26  cmd: grep 10833 [getblk] 6.95r 0.05u 0.29s 1% 2528k
>   > mi_switch+0x155 sleepq_switch+0x11a sleeplk+0x106 lockmgr_xlock_hard+0x3e5 __lockmgr_args+0x618 getblkx+0x13f cluster_read+0xc2 ffs_read+0x19f VOP_READ_APV+0x35 vn_read+0x1e8 vn_io_fault_doio+0x43 vn_io_fault1+0x16c vn_io_fault+0x1bb dofileread+0x81 sys_read+0xc0 amd64_syscall+0x140 fast_syscall_common+0xf8
>   >
>   > 	How do I go back to the old output?
>   Set sysctl kern.tty_info_kstacks to 0.
> 	That did it.
> 	Thanks.
> 	Umm ... is there a reason this isn't the default?

I think the idea was that it is useful enough to enable it by default. Otherwise, it would be really 
hard to discover it. This change was well received by various developers, and it also had an 
revision where the default was changed from 1 to 2 (or something) to make it a little bit more compact.



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