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authorJuri Lelli <juri.lelli@redhat.com>2018-02-13 19:55:18 +0100
committerIngo Molnar <mingo@kernel.org>2018-02-14 12:01:22 +0100
commite5684bbfc3f03480d6ba2150f133630fb510d3eb (patch)
tree04ffd26f60f4138ab031e194a43284c9bcdd2ad1 /Documentation/locking
parent7246a966b6784a9a72f3d8bcc2784cddee459967 (diff)
downloadlinux-e5684bbfc3f03480d6ba2150f133630fb510d3eb.tar.bz2
Documentation/locking/lockdep: Update info about states
Commit: d92a8cfcb37e ("locking/lockdep: Rework FS_RECLAIM annotation") removed the 'reclaim_fs' lockdep STATE. Reflect the change in the documentation. While we are at it, also clarify the formula to calculate the number of state bits. Signed-off-by: Juri Lelli <juri.lelli@redhat.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-doc@vger.kernel.org Link: http://lkml.kernel.org/r/20180213185519.18186-2-juri.lelli@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'Documentation/locking')
-rw-r--r--Documentation/locking/lockdep-design.txt4
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/locking/lockdep-design.txt b/Documentation/locking/lockdep-design.txt
index 9de1c158d44c..e341c2f34e68 100644
--- a/Documentation/locking/lockdep-design.txt
+++ b/Documentation/locking/lockdep-design.txt
@@ -27,7 +27,8 @@ lock-class.
State
-----
-The validator tracks lock-class usage history into 4n + 1 separate state bits:
+The validator tracks lock-class usage history into 4 * nSTATEs + 1 separate
+state bits:
- 'ever held in STATE context'
- 'ever held as readlock in STATE context'
@@ -37,7 +38,6 @@ The validator tracks lock-class usage history into 4n + 1 separate state bits:
Where STATE can be either one of (kernel/locking/lockdep_states.h)
- hardirq
- softirq
- - reclaim_fs
- 'ever used' [ == !unused ]