linux-kernel - Re: [patch 0/7] Add TRIM support for raid linear/0/1/10

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Date:	Sun, 18 Mar 2012 10:03:31 +0800
From:	Shaohua Li <shli@...nel.org>
To:	Mark Lord <kernel@...savvy.com>
Cc:	NeilBrown <neilb@...e.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-raid@...r.kernel.org" <linux-raid@...r.kernel.org>,
	"axboe@...nel.dk" <axboe@...nel.dk>
Subject: Re: [patch 0/7] Add TRIM support for raid linear/0/1/10

2012/3/18 Mark Lord <kernel@...savvy.com>:
> On 12-03-13 10:47 PM, Shaohua Li wrote:
>> On 3/14/12 10:24 AM, NeilBrown wrote:
>>>  On Mon, 12 Mar 2012 11:04:12 +0800 Shaohua Li <shli@...ionio.com> wrote:
> ..
>>>  Also I wonder about handling failure in RAID1.
>>>  I think the code will currently treat it like a write error, and
>>>  maybe record a bad block (then fail the device is writing the badblock
>>>  record fails). Is that what were want?
>> Mainly to simplify the code. And I thought a normal discard should not fail.
>> If it fails, something is wrong, marked it as badblock maybe not bad.
>
> That sounds like a VERY bad idea.
> Failures happen for lots of reasons,
> but generic comm errors are not an excuse to suddenly mark sectors as bad.
Not sure if I got it, but we treat discard similar like write. Did you
mean discard
request error is common?
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