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-rw-r--r--Documentation/ABI/testing/sysfs-fs-ext47
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-fs-ext4 b/Documentation/ABI/testing/sysfs-fs-ext4
index c631253cf85c..78604db56279 100644
--- a/Documentation/ABI/testing/sysfs-fs-ext4
+++ b/Documentation/ABI/testing/sysfs-fs-ext4
@@ -109,3 +109,10 @@ Description:
write operation (since a 4k random write might turn
into a much larger write due to the zeroout
operation).
+
+What: /sys/fs/ext4/<disk>/journal_task
+Date: February 2019
+Contact: "Theodore Ts'o" <tytso@mit.edu>
+Description:
+ This file is read-only and shows the pid of journal thread in
+ current pid-namespace or 0 if task is unreachable.