在 2010年7月18日 下午9:57，Wang Sheng-Hui <crosslonelyover@xxxxxxxxx> 写道：
> Sorry to resend this patch. For the 2nd patch should
> be applied after this patch, I just send them together.
>
> Following is the explanation of the patch:
> The comment for struct shrinker in include/linux/mm.h says
> "shrink...It should return the number of objects which remain in the
> cache."
> Please notice the word "remain".
>
> In fs/mbcache.h, mb_cache_shrink_fn is used as the shrink function:
> static struct shrinker mb_cache_shrinker = {
> .shrink = mb_cache_shrink_fn,
> .seeks = DEFAULT_SEEKS,
> };
> In mb_cache_shrink_fn, the return value for nr_to_scan > 0 is the
> number of mb_cache_entry before shrink operation. It may because the
> memory usage for mbcache is low, so the effect is not so obvious.
>
> Per Eric Sandeen, we should do the counting only once.
> Per Christoph Hellwig, we should use list_for_each_entry instead of
> list_for_each here.
>
> Following patch is against 2.6.35-rc4. Please check it.
>
>
Sorry, made a typo. It's against 2.6.35-rc5.
--
Thanks and Best Regards,
shenghui
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