[Ocfs2-devel] Re: [PATCH] Dynamic lockres hash table

[Sunil Mushran]

Jan Kara wrote:
>   Actually, it's non-trivial to measure (differently than by profiling).
> You cannot use standard time functions because they have too low resolution
> - we are speaking about microseconds here...
>   

jiffies should have enough resolution.

>   Definitely, they should have 16 or even 32 pages per mount.  With 500K
> lockres, which is not so extreme on bigger FS, 16 pages mean hash chains of
> average length 61 on x86_64. It is not ideal but I guess it should be
> sufficient.
>   

Any objections to increasing the default to 32 pages for 1.4?