From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
---|---|
To: | Andres Freund <andres(at)2ndquadrant(dot)com> |
Cc: | Simon Riggs <simon(at)2ndquadrant(dot)com>, Pavan Deolasee <pavan(dot)deolasee(at)gmail(dot)com>, pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: missing LockBuffer(buffer, BUFFER_LOCK_SHARE) in trigger.c GetTupleForTrigger? |
Date: | 2012-11-30 19:16:47 |
Message-ID: | 21640.1354303007@sss.pgh.pa.us |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-hackers |
Andres Freund <andres(at)2ndquadrant(dot)com> writes:
> On 2012-11-30 14:08:05 -0500, Tom Lane wrote:
>> BTW, I went looking for other places that might have a similar mistake.
>> I found that contrib/pageinspect/btreefuncs.c pokes around in btree
>> pages without any buffer lock, which seems pretty broken --- don't we
>> want it to take share lock?
> I seem to remember comments somewhere indicating that pageinspect (?)
> doesn't take locks by intention to make debugging of locking problems
> easier. Not sure whether thats really realistic, but ...
Dunno, that seems like a pretty lame argument when compared to the very
real possibility of crashing due to processing corrupt data. Besides,
the heap-page examination functions in the same module take buffer lock,
so why shouldn't these?
regards, tom lane
From | Date | Subject | |
---|---|---|---|
Next Message | Simon Riggs | 2012-11-30 19:26:30 | Re: Hot Standby Feedback should default to on in 9.3+ |
Previous Message | Andres Freund | 2012-11-30 19:12:31 | Re: missing LockBuffer(buffer, BUFFER_LOCK_SHARE) in trigger.c GetTupleForTrigger? |