From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756989Ab2ECObd (ORCPT ); Thu, 3 May 2012 10:31:33 -0400 Received: from bear.ext.ti.com ([192.94.94.41]:58775 "EHLO bear.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756705Ab2ECOYF (ORCPT ); Thu, 3 May 2012 10:24:05 -0400 From: Venkatraman S To: , , , , CC: , , , , , , Venkatraman S Subject: [PATCH v2 01/16] FS: Added demand paging markers to filesystem Date: Thu, 3 May 2012 19:53:00 +0530 Message-ID: <1336054995-22988-2-git-send-email-svenkatr@ti.com> X-Mailer: git-send-email 1.7.10.rc2 In-Reply-To: <1336054995-22988-1-git-send-email-svenkatr@ti.com> References: <1336054995-22988-1-git-send-email-svenkatr@ti.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ilan Smith Add attribute to identify demand paging requests. Mark readpages with demand paging attribute. Signed-off-by: Ilan Smith Signed-off-by: Alex Lemberg Signed-off-by: Venkatraman S --- fs/mpage.c | 2 ++ include/linux/bio.h | 7 +++++++ include/linux/blk_types.h | 2 ++ 3 files changed, 11 insertions(+) diff --git a/fs/mpage.c b/fs/mpage.c index 0face1c..8b144f5 100644 --- a/fs/mpage.c +++ b/fs/mpage.c @@ -386,6 +386,8 @@ mpage_readpages(struct address_space *mapping, struct list_head *pages, &last_block_in_bio, &map_bh, &first_logical_block, get_block); + if (bio) + bio->bi_rw |= REQ_RW_DMPG; } page_cache_release(page); } diff --git a/include/linux/bio.h b/include/linux/bio.h index 4d94eb8..264e0ef 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -57,6 +57,13 @@ (bio)->bi_rw |= ((unsigned long) (prio) << BIO_PRIO_SHIFT); \ } while (0) +static inline bool bio_rw_flagged(struct bio *bio, unsigned long flag) +{ + return ((bio->bi_rw & flag) != 0); +} + +#define bio_dmpg(bio) bio_rw_flagged(bio, REQ_RW_DMPG) + /* * various member access, note that bio_data should of course not be used * on highmem page vectors diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h index 4053cbd..87feb80 100644 --- a/include/linux/blk_types.h +++ b/include/linux/blk_types.h @@ -150,6 +150,7 @@ enum rq_flag_bits { __REQ_FLUSH_SEQ, /* request for flush sequence */ __REQ_IO_STAT, /* account I/O stat */ __REQ_MIXED_MERGE, /* merge of different types, fail separately */ + __REQ_RW_DMPG, __REQ_NR_BITS, /* stops here */ }; @@ -191,5 +192,6 @@ enum rq_flag_bits { #define REQ_IO_STAT (1 << __REQ_IO_STAT) #define REQ_MIXED_MERGE (1 << __REQ_MIXED_MERGE) #define REQ_SECURE (1 << __REQ_SECURE) +#define REQ_RW_DMPG (1 << __REQ_RW_DMPG) #endif /* __LINUX_BLK_TYPES_H */ -- 1.7.10.rc2