linux-kernel - Re: [PATCH v2 2/2] staging: erofs: complete POSIX ACL support

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Date:   Mon, 28 Jan 2019 21:30:53 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Chao Yu <chao@...nel.org>
Cc:     Gao Xiang <gaoxiang25@...wei.com>, Chao Yu <yuchao0@...wei.com>,
        devel@...verdev.osuosl.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Miao Xie <miaoxie@...wei.com>,
        LKML <linux-kernel@...r.kernel.org>, weidu.du@...wei.com,
        Fang Wei <fangwei1@...wei.com>, linux-erofs@...ts.ozlabs.org
Subject: Re: [PATCH v2 2/2] staging: erofs: complete POSIX ACL support

On Tue, Jan 29, 2019 at 12:41:55AM +0800, Chao Yu wrote:
> Hi Dan and Xiang,
> 
> On 2019-1-28 21:48, Gao Xiang wrote:
> > Hi Dan,
> > 
> > On 2019/1/28 21:33, Dan Carpenter wrote:
> >> Hopefully, regular kmalloc() is enough.
> >>
> >> Do really need the erofs_kmalloc() function?  Regular kmalloc() has
> >> fault injection already.  Have you tried to use it?
> 
> Yes, I think we'd better to use erofs_kmalloc(). :)
> 
> Actually, fault injection in erofs_kmalloc only affect erofs module, we can
> expect that the range of fault can be limited in erofs code, rather than whole
> kernel, so the test point can be aimed at more accurately.
> 

Are you serious?  The standard fault injection doesn't do that???

Please fix it instead of creating a duplicate better implementation
which only your filesystem can use.  I would have thought that obviously
any fault injection framework could at least be configured to test
specific code...

regards,
dan carpenter