[HEADSUP] Please help test device vnode bypass!

[Sebastian Schulze Struchtrup]

Poul-Henning Kamp wrote:

>Please test this feature.
>
>Even better, help test the perforce branch phk_bufwork if you can.
>
>Poul-Henning
>
>In message <200411081046.iA8AklqT003808 at repoman.freebsd.org>, Poul-Henning Kamp
> writes:
>  
>
>>phk         2004-11-08 10:46:47 UTC
>>
>> FreeBSD src repository
>>
>> Modified files:
>>   sys/fs/devfs         devfs_vnops.c 
>> Log:
>> Add optional device vnode bypass to DEVFS.
>>
>>    
>>

fops=0
1000000 bytes transferred in 4.865386 secs (205534 bytes/sec)

fops=1
1000000 bytes transferred in 2.513814 secs (397802 bytes/sec)

This would result in approx. 2us per syscall.

System is FreeBSD 6.0-CURRENT #25: Tue Nov  9 13:44:16 CET 2004  
(something like an Athlon XP 2k) with invariants and witness, without 
anything out of phk_bufwork.

No problems until now.