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authorNeil Brown <neilb@notabene.brown>2008-06-28 08:31:41 +1000
committerNeil Brown <neilb@notabene.brown>2008-06-28 08:31:41 +1000
commit72a23c211e4587859d5bf61ac4962d76e593fb02 (patch)
treeb35b554d7eb9c4b3a2cbc4d9378d362e5e56e44f /Documentation/md.txt
parent0fd62b861eac7d2dea9b7e939953b20f37186ea1 (diff)
downloadop-kernel-dev-72a23c211e4587859d5bf61ac4962d76e593fb02.zip
op-kernel-dev-72a23c211e4587859d5bf61ac4962d76e593fb02.tar.gz
Make sure all changes to md/sync_action are notified.
When the 'resync' thread starts or stops, when we explicitly set sync_action, or when we determine that there is definitely nothing to do, we notify sync_action. To stop "sync_action" from occasionally showing the wrong value, we introduce a new flags - MD_RECOVERY_RECOVER - to say that a recovery is probably needed or happening, and we make sure that we set MD_RECOVERY_RUNNING before clearing MD_RECOVERY_NEEDED. Signed-off-by: Neil Brown <neilb@suse.de>
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diff --git a/Documentation/md.txt b/Documentation/md.txt
index dca97ba..c05bfb55 100644
--- a/Documentation/md.txt
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@@ -386,6 +386,12 @@ also have
'check' and 'repair' will start the appropriate process
providing the current state is 'idle'.
+ This file responds to select/poll. Any important change in the value
+ triggers a poll event. Sometimes the value will briefly be
+ "recover" if a recovery seems to be needed, but cannot be
+ achieved. In that case, the transition to "recover" isn't
+ notified, but the transition away is.
+
mismatch_count
When performing 'check' and 'repair', and possibly when
performing 'resync', md will count the number of errors that are
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