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From: Xiaoguang Wang <xiaoguang.wang@linux.alibaba.com>
To: "Theodore Y. Ts'o" <tytso@mit.edu>
Cc: linux-ext4@vger.kernel.org
Subject: Re: [PATCH] ext4: disable mount with both dioread_nolock and nodelalloc
Date: Mon, 9 Sep 2019 11:40:34 +0800	[thread overview]
Message-ID: <fb03f569-6b38-9a85-3828-f814a5aec313@linux.alibaba.com> (raw)
In-Reply-To: <20190907160004.GB23683@mit.edu>

hi,

> On Wed, Jul 31, 2019 at 09:06:00PM +0800, Xiaoguang Wang wrote:
>> Mount with both dioread_nolock and nodelalloc will result in huge
>> performance drop, which indeed is an known issue, so before we fix
>> this issue, currently we disable this behaviour. Below test reproducer
>> can reveal this performance drop.
> 
> Is it really worth it to disable this combination?  Nothing goes
> *wrong* per se; it's just slower than we would like.
Yes, agree, then should we have some places to record this issue? In case
somebody looks into it again.

Regards,
Xiaoguang Wang

> 
> 	    	     	  	      	 - Ted
> 

      reply	other threads:[~2019-09-09  3:40 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-31 13:06 [PATCH] ext4: disable mount with both dioread_nolock and nodelalloc Xiaoguang Wang
2019-08-01  1:57 ` Joseph Qi
2019-09-02  1:31 ` Xiaoguang Wang
2019-09-07 16:00 ` Theodore Y. Ts'o
2019-09-09  3:40   ` Xiaoguang Wang [this message]

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