From: Tejun Heo <tj@kernel.org>
To: dsterba@suse.com, clm@fb.com, josef@toxicpanda.com,
axboe@kernel.dk, jack@suse.cz
Cc: linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-block@vger.kernel.org, kernel-team@fb.com,
Tejun Heo <tj@kernel.org>
Subject: [PATCH 3/9] blkcg, writeback: Implement wbc_blkcg_css()
Date: Sat, 15 Jun 2019 11:24:47 -0700 [thread overview]
Message-ID: <20190615182453.843275-4-tj@kernel.org> (raw)
In-Reply-To: <20190615182453.843275-1-tj@kernel.org>
Add a helper to determine the target blkcg from wbc.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
---
include/linux/writeback.h | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index b8f5f000cde4..800ee031e88a 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -11,6 +11,7 @@
#include <linux/flex_proportions.h>
#include <linux/backing-dev-defs.h>
#include <linux/blk_types.h>
+#include <linux/blk-cgroup.h>
struct bio;
@@ -93,6 +94,16 @@ static inline int wbc_to_write_flags(struct writeback_control *wbc)
return 0;
}
+static inline struct cgroup_subsys_state *
+wbc_blkcg_css(struct writeback_control *wbc)
+{
+#ifdef CONFIG_CGROUP_WRITEBACK
+ if (wbc->wb)
+ return wbc->wb->blkcg_css;
+#endif
+ return blkcg_root_css;
+}
+
/*
* A wb_domain represents a domain that wb's (bdi_writeback's) belong to
* and are measured against each other in. There always is one global
--
2.17.1
next prev parent reply other threads:[~2019-06-15 18:25 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-15 18:24 [PATCHSET v2 btrfs/for-next] blkcg, btrfs: fix cgroup writeback support Tejun Heo
2019-06-15 18:24 ` [PATCH 1/9] cgroup, blkcg: Prepare some symbols for module and !CONFIG_CGROUP usages Tejun Heo
2019-06-24 16:39 ` Jan Kara
2019-06-15 18:24 ` [PATCH 2/9] blkcg, writeback: Add wbc->no_wbc_acct Tejun Heo
2019-06-20 15:21 ` Jan Kara
2019-06-20 17:02 ` Tejun Heo
2019-06-24 8:21 ` Jan Kara
2019-06-24 12:58 ` Tejun Heo
2019-06-24 16:39 ` Jan Kara
2019-06-24 16:49 ` Jan Kara
2019-06-15 18:24 ` Tejun Heo [this message]
2019-06-24 16:50 ` [PATCH 3/9] blkcg, writeback: Implement wbc_blkcg_css() Jan Kara
2019-06-15 18:24 ` [PATCH 4/9] blkcg: implement REQ_CGROUP_PUNT Tejun Heo
2019-06-15 18:29 ` Tejun Heo
2019-06-20 15:37 ` Jan Kara
2019-06-20 16:42 ` Tejun Heo
2019-06-20 17:01 ` Jan Kara
2019-06-24 16:53 ` Jan Kara
2019-06-15 18:24 ` [PATCH 5/9] Btrfs: stop using btrfs_schedule_bio() Tejun Heo
2019-06-15 18:24 ` [PATCH 6/9] Btrfs: delete the entire async bio submission framework Tejun Heo
2019-06-15 18:24 ` [PATCH 7/9] Btrfs: only associate the locked page with one async_cow struct Tejun Heo
2019-06-15 18:24 ` [PATCH 8/9] Btrfs: use REQ_CGROUP_PUNT for worker thread submitted bios Tejun Heo
2019-06-15 18:24 ` [PATCH 9/9] Btrfs: extent_write_locked_range() should attach inode->i_wb Tejun Heo
2019-06-18 12:54 ` [PATCHSET v2 btrfs/for-next] blkcg, btrfs: fix cgroup writeback support David Sterba
2019-06-18 14:45 ` Tejun Heo
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