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Re: [PATCHv6 17/37] fs: make block_read_full_page() be able to read huge page

Started byMatthew Wilcox <willy@infradead.org>
First post2017-02-10 19:10 +0100
Last post2017-02-10 19:10 +0100
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  Re: [PATCHv6 17/37] fs: make block_read_full_page() be able to read  huge page Matthew Wilcox <willy@infradead.org> - 2017-02-10 19:10 +0100

#1578657 — Re: [PATCHv6 17/37] fs: make block_read_full_page() be able to read huge page

FromMatthew Wilcox <willy@infradead.org>
Date2017-02-10 19:10 +0100
SubjectRe: [PATCHv6 17/37] fs: make block_read_full_page() be able to read huge page
Message-ID<t9nNT-6VN-9@gated-at.bofh.it>
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 <kirill.shutemov@linux.intel.com>

Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com>

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