On 04/04/2014 04:56 PM, Tom Lane wrote:
Heikki Linnakangas hlinnakan...@vmware.com writes:
Ok, I fixed the issues that the assertion fixed. I also committed a
patch to add the assertion itself; let's see if the buildfarm finds more
cases that violate the rule.
It ignores the checkpointer, because it's known to violate the rule,
... uh, isn't that a bug to be fixed?
Yes. One step a time ;-).
and
allocations in ErrorContext, which is used during error recovery, e.g if
you indeed PANIC while in a critical section for some other reason.
Yeah, I realized we'd have to do something about elog's own allocations.
Not sure if a blanket exemption for ErrorContext is the best way. I'd
been thinking of having a way to turn off the complaint once processing
of an elog(PANIC) has started.
Hmm. PANIC processing should avoid allocations too, except in
ErrorContext, because otherwise you might get an out-of-memory during
PANIC processing.
ErrorContext also covers elog(DEBUG2, ...). I presume we'll want to
ignore that too. Although I also tried without the exemption for
ErrorContext at first, and didn't get any failures from the regression
tests, so I guess we never do that in a critical section. I was a bit
surprised by that.
BTW, I'm pretty sure you added some redundant assertions in mcxt.c.
eg, palloc does not need its own copy.
palloc is copy-pasted from MemoryContextAlloc - it does need its own copy.
- Heikki
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