On Sun, Feb 10, 2019 at 1:55 AM Thomas Munro
<thomas.munro@enterprisedb.com> wrote:
> Bleugh. Yeah. What I said before wasn't quite right. The value
> returned by FreePageManagerPutInternal() is actually correct at the
> moment it is returned, but it ceases to be correct immediately
> afterwards if the following call to FreePageBtreeCleanup() happens to
> reduce the size of that particular span. The problem is that we
> clobber fpm->contiguous_pages with the earlier (and by now incorrect)
> value that we were holding in a local variable.
Yeah, I had similar bugs to that during the initial development work I
did on freepage.c, and that's why I got rid of some lazy recomputation
thing that I had tried at some point. The version that got committed
brought that back again, but possibly it's got the same kind of
problem.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
