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Date:   Fri, 10 Feb 2017 09:58:52 -0800
From:   Matthew Wilcox <>
To:     "Kirill A. Shutemov" <>
Cc:     Theodore Ts'o <>,
        Andreas Dilger <>,
        Jan Kara <>,
        Andrew Morton <>,
        Alexander Viro <>,
        Hugh Dickins <>,
        Andrea Arcangeli <>,
        Dave Hansen <>,
        Vlastimil Babka <>,
        Ross Zwisler <>,,,,,
Subject: Re: [PATCHv6 17/37] fs: make block_read_full_page() be able to read
 huge page

On Thu, Jan 26, 2017 at 02:57:59PM +0300, Kirill A. Shutemov wrote:
> The approach is straight-forward: for compound pages we read out whole
> huge page.

Ouch.  bufferheads must die ;-)

> For huge page we cannot have array of buffer head pointers on stack --
> it's 4096 pointers on x86-64 -- 'arr' is allocated with kmalloc() for
> huge pages.
> Signed-off-by: Kirill A. Shutemov <>

Reviewed-by: Matthew Wilcox <>

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