Re: [RFC] kill sleep_on

[Manfred Spraul]

Trond Myklebust wrote:

> I'm not sure that taking inode->i_sem would be much of an improvement.
> Both th BKL and the inode semaphore seem superfluous to me in this
> situation.
I think the purpose of i_sem or lock_kernel is to protect the file 
pointer. Most local filesystems use i_sem, it's noticably faster - 
global vs. per-object locking.
Btw, generic_mapping_read should also lock it's accesses to f_pos: right 
now it reads and writes f_pos without any locking...

--
   Manfred

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