linux-kernel - Re: [PATCH v2] raid6/test/test.c: bug fix: Specify aligned(alignment) attributes to the char arrays

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Message-ID: <20160926231354.GA98739@kernel.org>
Date:   Mon, 26 Sep 2016 16:13:54 -0700
From:   Shaohua Li <shli@...nel.org>
To:     Gayatri Kammela <gayatri.kammela@...el.com>
Cc:     linux-raid@...r.kerenl.org, linux-kernel@...r.kernel.org,
        ravi.v.shankar@...el.com, fenghua.yu@...el.com,
        "H . Peter Anvin" <hpa@...or.com>,
        Yu-cheng Yu <yu-cheng.yu@...el.com>
Subject: Re: [PATCH v2] raid6/test/test.c: bug fix: Specify
 aligned(alignment) attributes to the char arrays

On Mon, Sep 26, 2016 at 02:37:38PM -0700, Gayatri Kammela wrote:
> Specifying the aligned attributes to the char data[NDISKS][PAGE_SIZE],
> char recovi[PAGE_SIZE] and char recovi[PAGE_SIZE] arrays, so that all
> malloc memory is page boundary aligned.
> 
> Without these alignment attributes, the test causes a segfault in
> userspace when the NDISKS are changed to 4 from 16.
> 
> The RAID stripes will be page aligned anyway, so we want to test what
> the kernel actually will execute.

Applied, thanks!