[OpenAFS-devel] [PATCH] crget() memory allocation oddity

[chas williams - CONTRACTOR]

In message <9ECA25ADC116985E0A319855@mariner.pc.cs.cmu.edu>,Jeffrey Hutzelman w
rites:
>I'm not so sure.  Since the OS doesn't actually have creds like we expect, 
>we have to cons them up for every filesystem operation (that is, every time 
>crget() is called).  That's pretty frequent, and it seems appropriate to 
>avoid the overhead of memory allocation every time.

but everytime we dive into crget() we are taking a mutex and grabbing
an entry from the pool.  that's essentially what kmalloc does most of
the time anyway.  you could save a little bit of memory not keeping
track of the same buffers twice.  i suspect empirical testing would
be necessary to decide if there is any perceptable difference.