linux-kernel - Re: [RFC][PATCH v3 09/22] mm, s390: add gfp flags variant of pud, pte, and pte allocations

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Message-ID: <20110321093412.2776a69f@mschwide.boeblingen.de.ibm.com>
Date:	Mon, 21 Mar 2011 09:34:12 +0100
From:	Martin Schwidefsky <schwidefsky@...ibm.com>
To:	Prasad Joshi <prasadjoshi124@...il.com>
Cc:	heiko.carstens@...ibm.com, linux390@...ibm.com,
	linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org,
	mitra@...nfotech.com
Subject: Re: [RFC][PATCH v3 09/22] mm, s390: add gfp flags variant of pud,
 pte, and pte allocations

On Fri, 18 Mar 2011 19:56:44 +0000
Prasad Joshi <prasadjoshi124@...il.com> wrote:

> - Added function __crst_table_alloc() which is similar to crst_table_alloc()
>   but accepts an extra argument gfp_t. The function uses given allocation
>   flag to allocate pages.
> 
> - Added a function __page_table_alloc() to allocate page table entries. This
>   function is allows caller to specify the page allocation flag. The
>   allocation flag is then passed to alloc_page(). The rest of the function is
>   copy of the original page_table_alloc().

The approach of this patch series seems straightforward, the only nitpick I
have is the fact that two new functions __crst_table_alloc/__page_table_alloc
are introduced. There aren't many call sites for the two original functions,
namely 4 for crst_table_alloc and 3 for page_table_alloc. Why not add the
gfp flag GFP_KERNEL to these call sites? Then the two additional functions
would not be needed.

-- 
blue skies,
   Martin.

"Reality continues to ruin my life." - Calvin.

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