Summary: IMM PBE: use syncronous admin-op to abort CCBs & delay attach by 1 sec [#1261] Review request for Trac Ticket(s): 1261 Peer Reviewer(s): Neel Pull request to: Affected branch(es): default Development branch: default
-------------------------------- Impacted area Impact y/n -------------------------------- Docs n Build system n RPM/packaging n Configuration files n Startup scripts n SAF services n OpenSAF services n Core libraries n Samples n Tests n Other n Comments (indicate scope for each "y" above): --------------------------------------------- changeset d844faaf6d52f9096283e16cad438785388a617f Author: Anders Bjornerstedt <[email protected]> Date: Wed, 08 Jul 2015 14:46:29 +0200 IMM PBE: use syncronous admin-op to abort CCBs & delay attach by 1 sec [#1261] Using a syncronous admin-op results in the PBE getting blocked until the admin-op has been completed. The admin-op only sets a flag in he IMMND coord indicating the request to abort non crirical ccbs. The actual processing is done in ImmModel::cleanTheBasement with a period of 1 sec. To cover this the PBE also waits for 1 second after the admin-operation has returned to ensure that the abort messages have been generated by the IMMND coord. This still means that fevs messages for ccb aborts may be in transit. But since the attach of the PBE-OI itself goes over fevs, the PBE-OI attach should get processed after the aborts. The mechanism is not 100% tight. On the other hand, enabling and disabling the PBE should be rare and avoided and CCBs may get resource aborted for other reasons such as a blocked/overloaded filesystem. This adjustment to PBE was needed to cater for usage by SMF which is actually questionable since the PBE is togled off and on during an SMF campaign and not just before and after a campaign. But since the fix is trivial and has no serious down side, we accept it. The 1 second delay will not delay cluster restart or any other realtime critical operations. The PBE availability is only necessary to service CCBs and persistent runtime data changes, neither of which should ever be realtime critical or SA critical. Complete diffstat: ------------------ osaf/services/saf/immsv/immpbed/immpbe.cc | 22 +++++++++++++--------- 1 files changed, 13 insertions(+), 9 deletions(-) Testing Commands: ----------------- Starting with PBE disabled, testing in principle in principle requires two CCBs in sequence. The first CCB enables PBE. The second CCB updates some data. Ideally the second CCB should be delayed by TRY_AGAIN until PBE has attached as PBE-OI. Testing, Expected Results: -------------------------- The secopnd CCB will often succeed. Success can not be 100% guaranteed since tghere is never 100% guarantee of CCB success. But at least he seconds CCB should hopefully succeed much more often than it fails. Conditions of Submission: ------------------------- Ack from Neel. Arch Built Started Linux distro ------------------------------------------- mips n n mips64 n n x86 n n x86_64 n n powerpc n n powerpc64 n n Reviewer Checklist: ------------------- [Submitters: make sure that your review doesn't trigger any checkmarks!] Your checkin has not passed review because (see checked entries): ___ Your RR template is generally incomplete; it has too many blank entries that need proper data filled in. ___ You have failed to nominate the proper persons for review and push. ___ Your patches do not have proper short+long header ___ You have grammar/spelling in your header that is unacceptable. ___ You have exceeded a sensible line length in your headers/comments/text. ___ You have failed to put in a proper Trac Ticket # into your commits. ___ You have incorrectly put/left internal data in your comments/files (i.e. internal bug tracking tool IDs, product names etc) ___ You have not given any evidence of testing beyond basic build tests. 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