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Message-ID: <b9794188-f1e1-20ab-6aec-04312cbb02bf@linux.alibaba.com>
Date:   Tue, 13 Sep 2022 14:34:46 +0800
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Subject: Re: [External] Re: [PATCH V2 2/5] erofs: introduce fscache-based
 domain
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To:     Jia Zhu <zhujia.zj@bytedance.com>, linux-erofs@lists.ozlabs.org,
        xiang@kernel.org, chao@kernel.org
Cc:     linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
        yinxin.x@bytedance.com, huyue2@coolpad.com
References: <20220902105305.79687-1-zhujia.zj@bytedance.com>
 <20220902105305.79687-3-zhujia.zj@bytedance.com>
 <ac567b29-dd30-7b65-aefb-3f23e59781cb@linux.alibaba.com>
 <fe9199a2-a8d5-98c9-461b-e7a2cbf87516@bytedance.com>
From:   JeffleXu <jefflexu@linux.alibaba.com>
In-Reply-To: <fe9199a2-a8d5-98c9-461b-e7a2cbf87516@bytedance.com>
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On 9/13/22 12:31 PM, Jia Zhu wrote:
> 
> 
> 在 2022/9/9 16:42, JeffleXu 写道:
>>>   int erofs_fscache_register_cookie(struct super_block *sb,
>>>                     struct erofs_fscache **fscache,
>>>                     char *name, bool need_inode)
>>> @@ -495,7 +581,8 @@ int erofs_fscache_register_fs(struct super_block
>>> *sb)
>>>       char *name;
>>>       int ret = 0;
>>>   -    name = kasprintf(GFP_KERNEL, "erofs,%s", sbi->opt.fsid);
>>> +    name = kasprintf(GFP_KERNEL, "erofs,%s",
>>> +            sbi->domain ? sbi->domain->domain_id : sbi->opt.fsid);
>>
>> Do we also need to encode the cookie name in the "<domain_id>,<fsid>"
>> format? This will affect the path of the cache files.
>>
> I think even though the cookies have the same name, they belong to
> different volumes(path). Cookies do not affect each other.
> Are there other benefits to doing so?

Okay. The current implementation is correct. Please ignore the noise.


-- 
Thanks,
Jingbo