On Wed, 2010-01-20 at 11:04 +0100, Andres Freund wrote: > On Wednesday 20 January 2010 10:52:24 Simon Riggs wrote: > > On Wed, 2010-01-20 at 10:45 +0100, Andres Freund wrote: > > > LWLockAcquire > > > > I'm using spinlocks, not lwlocks. > CancelDBBackends which is used in SendRecoveryConflictWithBufferPin which in > turn used by CheckStandbyTimeout triggered by SIGALRM acquires the lwlock.
Those are used in similar ways to deadlock detection. > Now that case is a bit less dangerous because you would have to interrupt > yourself to trigger a deadlock there because the code sleeps soon after > setting up the handler. > If ever two SIGALRM occur consecutive there is a problem. I'll protect against subsequent calls. -- Simon Riggs www.2ndQuadrant.com -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
