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luminous: mds: mds got laggy because of MDSBeacon stuck in mqueue #23556

merged 1 commit into from Sep 17, 2018


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batrick commented Aug 13, 2018

mds: use fast dispatch to handle MDSBeacon
Current mds handles MDSBeacon messages through MDSRank::ms_dispatch().
MDSRank::ms_dispatch() locks mds_lock at the very beginning. This means
that long running task (such as processing finished contexts) can delay
MMDSBeacon. Using fast dispatch for MDSBeacon can avoid this issue.

Signed-off-by: "Yan, Zheng" <>
(cherry picked from commit 7fc04be)

@batrick batrick added the cephfs label Aug 13, 2018

@tchaikov tchaikov added this to the luminous milestone Aug 14, 2018

@smithfarm smithfarm requested a review from ukernel Aug 23, 2018


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yuriw commented Sep 13, 2018


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batrick commented Sep 17, 2018

Reviewed-by: Patrick Donnelly <>

@yuriw yuriw merged commit d6d5b63 into ceph:luminous Sep 17, 2018

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Docs: build check OK - docs built
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@batrick batrick deleted the batrick:i26924 branch Sep 26, 2018

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