[Linux-cluster] Re: [PATCH 00/14] GFS
David Teigland
teigland at redhat.com
Thu Aug 11 06:06:02 UTC 2005
On Tue, Aug 02, 2005 at 09:45:24AM +0200, Arjan van de Ven wrote:
> * + if (create)
> + down_write(&ip->i_rw_mutex);
> + else
> + down_read(&ip->i_rw_mutex);
>
> why do you use a rwsem and not a regular semaphore? You are aware that
> rwsems are far more expensive than regular ones right? How skewed is
> the read/write ratio?
Rough tests show around 4/1, that high or low?
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