2010/7/20 shenghui <crosslonelyover@xxxxxxxxx>:
> 2010/7/20 Andreas Gruenbacher <agruen@xxxxxxx>:
>
> Sorry, I haven't found any special attention on
> sysctl_vfs_cache_pressure == 0 case or scale
> nr_to_scan in fs/dcache.c
>
> 900static int shrink_dcache_memory(int nr, gfp_t gfp_mask)
> 901{
> 902 if (nr) {
> 903 if (!(gfp_mask & __GFP_FS))
> 904 return -1;
> 905 prune_dcache(nr);
> 906 }
> 907 return (dentry_stat.nr_unused / 100) * sysctl_vfs_cache_pressure;
> 908}
>
And for sysctl_vfs_cache_pressure == 0 case, it's
enough to return 0 to indicate no cache entries left.
--
Thanks and Best Regards,
shenghui
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