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

From: Matthew Wilcox
Date: Fri Feb 10 2017 - 13:06:07 EST

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@xxxxxxxxxxxxxxx>

Reviewed-by: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>