linux-kernel - Re: [PATCH v2 3/3] staging: erofs: support IO read error injection

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Message-ID: <2719c5f6-b6db-65bf-6c7e-3fa25dbcbf6f@huawei.com>
Date:   Mon, 25 Mar 2019 11:43:46 +0800
From:   Chao Yu <yuchao0@...wei.com>
To:     Gao Xiang <gaoxiang25@...wei.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        <devel@...verdev.osuosl.org>
CC:     LKML <linux-kernel@...r.kernel.org>,
        <linux-erofs@...ts.ozlabs.org>, "Chao Yu" <chao@...nel.org>,
        Miao Xie <miaoxie@...wei.com>, <weidu.du@...wei.com>,
        Fang Wei <fangwei1@...wei.com>
Subject: Re: [PATCH v2 3/3] staging: erofs: support IO read error injection

On 2019/3/25 11:40, Gao Xiang wrote:
> Used to simulate disk IO read error for testing fatal
> error tolerance.
> 
> Here are the details,
> 1) use bio->bi_private to indicate super_block
>    for non-compressed bios since some (mainly meta)
>    pages can be of the corresponding bdev inode;
> 2) get super_block dynamically for compressed bios,
>    therefore it could not inject bios full of staging
>    pages, yet it doesn't affect the normal usage.
> 
> Signed-off-by: Gao Xiang <gaoxiang25@...wei.com>

Reviewed-by: Chao Yu <yuchao0@...wei.com>

Thanks,