Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752497AbaGYWrU (ORCPT ); Fri, 25 Jul 2014 18:47:20 -0400 Received: from mail.kernel.org ([198.145.19.201]:48591 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751618AbaGYWrT (ORCPT ); Fri, 25 Jul 2014 18:47:19 -0400 From: Jaegeuk Kim To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net Cc: Jaegeuk Kim Subject: [PATCH 01/11] f2fs: add nobarrier mount option Date: Fri, 25 Jul 2014 15:47:15 -0700 Message-Id: <1406328445-63707-1-git-send-email-jaegeuk@kernel.org> X-Mailer: git-send-email 1.8.5.2 (Apple Git-48) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch adds a mount option, nobarrier, in f2fs. The assumption in here is that file system keeps the IO ordering, but doesn't care about cache flushes inside the storages. Signed-off-by: Jaegeuk Kim --- fs/f2fs/data.c | 5 ++++- fs/f2fs/f2fs.h | 1 + fs/f2fs/segment.c | 3 +++ fs/f2fs/super.c | 7 +++++++ 4 files changed, 15 insertions(+), 1 deletion(-) diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index c77c667..482313d 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -139,7 +139,10 @@ void f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, /* change META to META_FLUSH in the checkpoint procedure */ if (type >= META_FLUSH) { io->fio.type = META_FLUSH; - io->fio.rw = WRITE_FLUSH_FUA | REQ_META | REQ_PRIO; + if (test_opt(sbi, NOBARRIER)) + io->fio.rw = WRITE_FLUSH | REQ_META | REQ_PRIO; + else + io->fio.rw = WRITE_FLUSH_FUA | REQ_META | REQ_PRIO; } __submit_merged_bio(io); up_write(&io->io_rwsem); diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 8f507d4..e999eec 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -41,6 +41,7 @@ #define F2FS_MOUNT_INLINE_XATTR 0x00000080 #define F2FS_MOUNT_INLINE_DATA 0x00000100 #define F2FS_MOUNT_FLUSH_MERGE 0x00000200 +#define F2FS_MOUNT_NOBARRIER 0x00000400 #define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option) #define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option) diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 8a6e57d..9fce0f47 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -239,6 +239,9 @@ int f2fs_issue_flush(struct f2fs_sb_info *sbi) struct flush_cmd_control *fcc = SM_I(sbi)->cmd_control_info; struct flush_cmd cmd; + if (test_opt(sbi, NOBARRIER)) + return 0; + if (!test_opt(sbi, FLUSH_MERGE)) return blkdev_issue_flush(sbi->sb->s_bdev, GFP_KERNEL, NULL); diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 34649aa..eec89a2 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -52,6 +52,7 @@ enum { Opt_inline_xattr, Opt_inline_data, Opt_flush_merge, + Opt_nobarrier, Opt_err, }; @@ -69,6 +70,7 @@ static match_table_t f2fs_tokens = { {Opt_inline_xattr, "inline_xattr"}, {Opt_inline_data, "inline_data"}, {Opt_flush_merge, "flush_merge"}, + {Opt_nobarrier, "nobarrier"}, {Opt_err, NULL}, }; @@ -339,6 +341,9 @@ static int parse_options(struct super_block *sb, char *options) case Opt_flush_merge: set_opt(sbi, FLUSH_MERGE); break; + case Opt_nobarrier: + set_opt(sbi, NOBARRIER); + break; default: f2fs_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" or missing value", @@ -544,6 +549,8 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root) seq_puts(seq, ",inline_data"); if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE)) seq_puts(seq, ",flush_merge"); + if (!f2fs_readonly(sbi->sb) && test_opt(sbi, NOBARRIER)) + seq_puts(seq, ",nobarrier"); seq_printf(seq, ",active_logs=%u", sbi->active_logs); return 0; -- 1.8.5.2 (Apple Git-48) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/