linux-ext4 - Re: [PATCH 1/2 RESEND] fix return value for mb_cache_shrink_fn when nr_to

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sun, 18 Jul 2010 21:58:59 +0800
From:	shenghui <crosslonelyover@...il.com>
To:	linux-fsdevel@...r.kernel.org, viro@...iv.linux.org.uk,
	linux-mm@...ck.org, linux-ext4 <linux-ext4@...r.kernel.org>,
	kernel-janitors <kernel-janitors@...r.kernel.org>,
	Christoph Hellwig <hch@...radead.org>,
	Eric Sandeen <sandeen@...hat.com>
Subject: Re: [PATCH 1/2 RESEND] fix return value for mb_cache_shrink_fn when 
	nr_to_scan > 0

在 2010年7月18日 下午9:57，Wang Sheng-Hui <crosslonelyover@...il.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 from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html