Re: devfs: BKL *not* taken while opening devices

Dave Hansen (haveblue@us.ibm.com)
Tue, 30 Apr 2002 09:58:42 -0700

Arjan van de Ven wrote:
>>I like the idea. But, while we're at it, does anyone have a good enough
>>grasp of locking the the TTY layer that we can start peeling some of the
>>BKL out of there? Somebody was doing tests over a serial console here
>>and the lockmeter data showed horrible BKL contention and hold times.
>
> I really really doubt that fixing contention will make serial ports go
> faster...

I know :) It just takes extra explaining on my part whenever someone
sees the lockmeter data.

> it'll just move to another lock since I suspect we're
> just waiting for hardware

Just about any other lock is preferrable to the BKL. Should
ext2_update_inode() be blocked because someone hit "Enter"?

-- 
Dave Hansen
haveblue@us.ibm.com


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