From: Kanchan Joshi <joshi.k@samsung.com>
To: linux-fsdevel@vger.kernel.org
Cc: linux-block@vger.kernel.org, linux-ext4@vger.kernel.org,
linux-nvme@lists.infradead.org, jack@suse.com,
david@fromorbit.com, tytso@mit.edu, prakash.v@samsung.com,
Kanchan Joshi <joshi.k@samsung.com>
Subject: [PATCH 2/4] fs: introduce four macros for in-kernel hints
Date: Wed, 09 Jan 2019 21:00:59 +0530 [thread overview]
Message-ID: <1547047861-7271-3-git-send-email-joshi.k@samsung.com> (raw)
In-Reply-To: <1547047861-7271-1-git-send-email-joshi.k@samsung.com>
Exiting write-hints are exposed to user-mode. There is a possiblity
of conflict if kernel happens to use those. This patch introduces four
write-hints for exclusive kernel-mode use.
Signed-off-by: Kanchan Joshi <joshi.k@samsung.com>
---
include/linux/fs.h | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 811c777..e8548eb 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -291,6 +291,11 @@ enum rw_hint {
WRITE_LIFE_MEDIUM = RWH_WRITE_LIFE_MEDIUM,
WRITE_LIFE_LONG = RWH_WRITE_LIFE_LONG,
WRITE_LIFE_EXTREME = RWH_WRITE_LIFE_EXTREME,
+/* below ones are meant for in-kernel use */
+ KERN_WRITE_LIFE_SHORT,
+ KERN_WRITE_LIFE_MEDIUM,
+ KERN_WRITE_LIFE_LONG,
+ KERN_WRITE_LIFE_EXTREME
};
#define IOCB_EVENTFD (1 << 0)
--
2.7.4
next prev parent reply other threads:[~2019-01-09 15:33 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20190109153328epcas2p4643cbdc7a2182b47893a2bcaa0778e17@epcas2p4.samsung.com>
2019-01-09 15:30 ` [PATCH v2 0/4] Write-hint for FS journal Kanchan Joshi
[not found] ` <CGME20190109153332epcas1p187b419176a8d1d0be4982a275c0b9e86@epcas1p1.samsung.com>
2019-01-09 15:30 ` [PATCH 1/4] block: Increase count of supported write-hints Kanchan Joshi
[not found] ` <CGME20190109153336epcas2p29b3275b6c545e483a3f43b92268f08bf@epcas2p2.samsung.com>
2019-01-09 15:30 ` Kanchan Joshi [this message]
2019-01-23 18:27 ` [PATCH 2/4] introduce four macros for in-kernel hints Javier González
2019-01-24 8:35 ` Jan Kara
2019-01-24 9:23 ` Javier González
[not found] ` <CGME20190109153339epcas2p4691a898dde0174a7565d62fcb3be0b6d@epcas2p4.samsung.com>
2019-01-09 15:31 ` [PATCH 3/4] fs: introduce APIs to enable sending write-hint with buffer-head Kanchan Joshi
[not found] ` <CGME20190109153342epcas2p3208f62a4dd876f8e1765b48f8aec2432@epcas2p3.samsung.com>
2019-01-09 15:31 ` [PATCH 4/4] fs/ext4,jbd2: add support for passing write-hint with journal Kanchan Joshi
2019-01-24 8:50 ` Jan Kara
2019-01-23 18:35 ` [PATCH v2 0/4] Write-hint for FS journal Javier González
2019-01-24 8:29 ` Jan Kara
2019-01-25 14:20 ` Kanchan Joshi
2019-01-25 16:23 ` Keith Busch
2019-01-28 12:47 ` Jan Kara
2019-01-28 23:24 ` Keith Busch
2019-01-29 10:07 ` Jan Kara
2019-01-30 0:13 ` Dave Chinner
2019-01-30 13:54 ` Kanchan Joshi
2019-02-05 11:50 ` Jan Kara
2019-02-05 22:53 ` Dave Chinner
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