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Our infinite_recurse() test to verify sane stack-overrun behavior is affected by a bug of the Linux kernel on PPC64: it will get SIGSEGV if it receives a signal when the stack depth is (a) over 1MB and (b) within a few kB of filling the current physical stack allocation. See https://bugzilla.kernel.org/show_bug.cgi?id=205183. Since this test is a bit time-consuming and we run it in parallel with test scripts that do a lot of DDL, it can be expected to get an sinval catchup interrupt at some point, leading to failure if the timing is wrong. This has caused more than 100 buildfarm failures over the past year or so. While a fix exists for the kernel bug, it might be years before that propagates into all production kernels, particularly in some of the older distros we have in the buildfarm. For now, let's just back off and not run this test on Linux PPC64; that loses nothing in test coverage so far as our own code is concerned. To do that, split this test into a new script infinite_recurse.sql and skip the test when the platform name is powerpc64...-linux-gnu. Back-patch to v12. Branches before that have not been seen to get this failure. No doubt that's because the "errors" test was not run in parallel with other tests before commit |
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PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.