From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752426AbcDZP4I (ORCPT ); Tue, 26 Apr 2016 11:56:08 -0400 Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:33823 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752074AbcDZP4D (ORCPT ); Tue, 26 Apr 2016 11:56:03 -0400 From: Jens Axboe To: , , CC: , , , Jens Axboe Subject: [PATCH 1/8] block: add WRITE_BG Date: Tue, 26 Apr 2016 09:55:24 -0600 Message-ID: <1461686131-22999-2-git-send-email-axboe@fb.com> X-Mailer: git-send-email 2.8.0.rc4.6.g7e4ba36 In-Reply-To: <1461686131-22999-1-git-send-email-axboe@fb.com> References: <1461686131-22999-1-git-send-email-axboe@fb.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [192.168.54.13] X-Proofpoint-Spam-Reason: safe X-FB-Internal: Safe X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2016-04-26_08:,, signatures=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This adds a new request flag, REQ_BG, that callers can use to tell the block layer that this is background (non-urgent) IO. No functional changes in this patch. Signed-off-by: Jens Axboe --- include/linux/blk_types.h | 4 +++- include/linux/fs.h | 4 ++++ 2 files changed, 7 insertions(+), 1 deletion(-) diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h index 86a38ea1823f..223012451c7a 100644 --- a/include/linux/blk_types.h +++ b/include/linux/blk_types.h @@ -161,6 +161,7 @@ enum rq_flag_bits { __REQ_INTEGRITY, /* I/O includes block integrity payload */ __REQ_FUA, /* forced unit access */ __REQ_FLUSH, /* request for cache flush */ + __REQ_BG, /* background activity */ /* bio only flags */ __REQ_RAHEAD, /* read ahead, can fail anytime */ @@ -208,7 +209,7 @@ enum rq_flag_bits { #define REQ_COMMON_MASK \ (REQ_WRITE | REQ_FAILFAST_MASK | REQ_SYNC | REQ_META | REQ_PRIO | \ REQ_DISCARD | REQ_WRITE_SAME | REQ_NOIDLE | REQ_FLUSH | REQ_FUA | \ - REQ_SECURE | REQ_INTEGRITY) + REQ_SECURE | REQ_INTEGRITY | REQ_BG) #define REQ_CLONE_MASK REQ_COMMON_MASK #define BIO_NO_ADVANCE_ITER_MASK (REQ_DISCARD|REQ_WRITE_SAME) @@ -235,6 +236,7 @@ enum rq_flag_bits { #define REQ_COPY_USER (1ULL << __REQ_COPY_USER) #define REQ_FLUSH (1ULL << __REQ_FLUSH) #define REQ_FLUSH_SEQ (1ULL << __REQ_FLUSH_SEQ) +#define REQ_BG (1ULL << __REQ_BG) #define REQ_IO_STAT (1ULL << __REQ_IO_STAT) #define REQ_MIXED_MERGE (1ULL << __REQ_MIXED_MERGE) #define REQ_SECURE (1ULL << __REQ_SECURE) diff --git a/include/linux/fs.h b/include/linux/fs.h index 70e61b58baaf..bb8f951cc619 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -192,6 +192,9 @@ typedef void (dax_iodone_t)(struct buffer_head *bh_map, int uptodate); * WRITE_FLUSH_FUA Combination of WRITE_FLUSH and FUA. The IO is preceded * by a cache flush and data is guaranteed to be on * non-volatile media on completion. + * WRITE_BG Background write. This is for background activity like + * the periodic flush and background threshold writeback + * * */ #define RW_MASK REQ_WRITE @@ -207,6 +210,7 @@ typedef void (dax_iodone_t)(struct buffer_head *bh_map, int uptodate); #define WRITE_FLUSH (WRITE | REQ_SYNC | REQ_NOIDLE | REQ_FLUSH) #define WRITE_FUA (WRITE | REQ_SYNC | REQ_NOIDLE | REQ_FUA) #define WRITE_FLUSH_FUA (WRITE | REQ_SYNC | REQ_NOIDLE | REQ_FLUSH | REQ_FUA) +#define WRITE_BG (WRITE | REQ_NOIDLE | REQ_BG) /* * Attribute flags. These should be or-ed together to figure out what -- 2.8.0.rc4.6.g7e4ba36