linux-kernel - Re: md: Combine two kmalloc() calls into one in sb

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Date:   Fri, 9 Dec 2016 23:04:55 +0100
From:   Bernd Schubert <bernd.schubert@...tmail.fm>
To:     SF Markus Elfring <elfring@...rs.sourceforge.net>
Cc:     linux-raid@...r.kernel.org, Shaohua Li <shli@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: Re: md: Combine two kmalloc() calls into one in sb_equal()



On 09.12.2016 22:58, SF Markus Elfring wrote:
>> Irrelevant, the variable is not used before checking it.
>
> * Will it be more appropriate to attempt another memory allocation only if
>   the previous one succeeded already?
>
> * Can it be a bit more efficient to duplicate only the required data
>   in a single function call before?

How many memory allocations do you expect to fail?