linux-ext4 - [PATCHv1, RFC 18/33] HACK: block: bump BIO_MAX

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Date:	Tue, 26 Jul 2016 03:35:20 +0300
From:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To:	"Theodore Ts'o" <tytso@....edu>,
	Andreas Dilger <adilger.kernel@...ger.ca>,
	Jan Kara <jack@...e.com>
Cc:	Alexander Viro <viro@...iv.linux.org.uk>,
	Hugh Dickins <hughd@...gle.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dave Hansen <dave.hansen@...el.com>,
	Vlastimil Babka <vbabka@...e.cz>,
	Matthew Wilcox <willy@...radead.org>,
	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,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: [PATCHv1, RFC 18/33] HACK: block: bump BIO_MAX_PAGES

We are going to do IO a huge page a time. For x86-64, it's 512 pages, so
we need to double current BIO_MAX_PAGES.

To be portable to other archtectures we need more generic solution.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
---
 include/linux/bio.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/bio.h b/include/linux/bio.h
index b7e1a00810f2..e10c67f21366 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -40,7 +40,7 @@
 #define BIO_BUG_ON
 #endif
 
-#define BIO_MAX_PAGES		256
+#define BIO_MAX_PAGES		512
 
 #define bio_prio(bio)			(bio)->bi_ioprio
 #define bio_set_prio(bio, prio)		((bio)->bi_ioprio = prio)
-- 
2.8.1

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