Re: [PATCH 1/2 RESEND] fix return value for mb_cache_shrink_fn when nr_to_scan > 0

[shenghui <crosslonelyover@gmail.com>]

在 2010年7月18日 下午9:57，Wang Sheng-Hui <crosslonelyover@gmail.com> 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

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>