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Message-ID: <20170210175852.GE2267@bombadil.infradead.org> Date: Fri, 10 Feb 2017 09:58:52 -0800 From: Matthew Wilcox <willy@...radead.org> To: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com> Cc: Theodore Ts'o <tytso@....edu>, Andreas Dilger <adilger.kernel@...ger.ca>, Jan Kara <jack@...e.com>, Andrew Morton <akpm@...ux-foundation.org>, Alexander Viro <viro@...iv.linux.org.uk>, Hugh Dickins <hughd@...gle.com>, Andrea Arcangeli <aarcange@...hat.com>, Dave Hansen <dave.hansen@...el.com>, Vlastimil Babka <vbabka@...e.cz>, Ross Zwisler <ross.zwisler@...ux.intel.com>, linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, linux-mm@...ck.org, linux-block@...r.kernel.org 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 <kirill.shutemov@...ux.intel.com> Reviewed-by: Matthew Wilcox <mawilcox@...rosoft.com>
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