[SSI-devel] [ ssic-linux-Bugs-986537 ] semundo doesn't happen upon nodedown

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Bugs item #986537, was opened at 2004-07-07 17:35
Message generated for change (Comment added) made by keerthi
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Category: IPC
Group: default
Status: Closed
Resolution: None
Priority: 7
Submitted By: Keerthi Bhushan (keerthi)
Assigned to: Keerthi Bhushan (keerthi)
Summary: semundo doesn't happen upon nodedown

Initial Comment:
Bug found by Andrea (ro...@co...)
QUOTE
Hello
I have a question about semaphores and OpenSSI. If you
use the SEM_UNDO flag with every semop every
modification to the semaphore is replayed if the
process that made them is terminated. I think that this
undo is not performed, when a node goes down and the
process that had made the modification was running on
it. Is this correct? Does anybody have a solution for it?
Andreas 
UNQUOTE

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>Comment By: Keerthi Bhushan (keerthi)
Date: 2004-07-13 16:51

Message:
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The following files contain the fix on the OPENSSI-RH branch.

1. openssi/kernel/ipc sem.c,1.2.2.12 
2. openssi/kernel/cluster/ssi/ipc/namesvr_func.c,1.1.2.12

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Comment By: Keerthi Bhushan (keerthi)
Date: 2004-07-12 14:38

Message:
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We are not doing the undo's when a node goes down along with
the process that had performed semop (with UNDO flag).
openssi/kernel/ipc/sem.c:ipc_semundo_nodedown() routine has
been added to fix this.

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