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Date:   Wed, 4 Aug 2021 19:33:15 +0100
From:   Matthew Wilcox <willy@infradead.org>
To:     "Kuppuswamy, Sathyanarayanan" 
        <sathyanarayanan.kuppuswamy@linux.intel.com>
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "Rafael J . Wysocki" <rafael@kernel.org>,
        Jonathan Corbet <corbet@lwn.net>,
        Dan Williams <dan.j.williams@intel.com>,
        Andi Kleen <ak@linux.intel.com>,
        Kuppuswamy Sathyanarayanan <knsathya@kernel.org>,
        linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org
Subject: Re: [PATCH v1] driver: base: Add driver filter support
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References: <20210804174322.2898409-1-sathyanarayanan.kuppuswamy@linux.intel.com>
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On Wed, Aug 04, 2021 at 11:29:31AM -0700, Kuppuswamy, Sathyanarayanan wrote:
> 
> 
> On 8/4/21 11:08 AM, Matthew Wilcox wrote:
> > Why use a doubly-linked-list here?  An allocating xarray should perform
> > much better and use less memory.
> 
> We don't expect the list to be too long. So we may not gain any significant
> advantage in terms of performance or memory when using alternate lists. Since
> linked list easier to use, we chose it.

It is not easier to use.