On Jun 15, 2026, at 4:43 AM, Rainer Orth <[email protected]> wrote: > As discussed in PR testsuite/125584, the gfortran.dg/coarray tests with > -lcaf_shmem require excessive amounts of backing store for their shared > memory images: for 64-bit tests, each test uses 4 GB images. > > On Solaris, the mapped files reside in /tmp/.LIBRT/SHM, which is tmpfs. > During parallel testing, several such tests can run in parallel, leading > to excessive VM use, in particular on targets like Solaris that don't > use lazy allocation. This is unacceptable since the testsuite defaults > need to be safe for all targets. > > The tests PASS just fine when limiting GFORTRAN_SHARED_MEMORY_SIZE to 2M > instead. To allow for testing with either the default or a different > size, setting GCC_TEST_RUN_EXPENSIVE to a non-empty string allows to > override this. > > Tested on amd64-pc-solaris2.11 and x86_64-pc-linux-gnu. > > Ok for trunk?
Can I ask what the minimum size is needed to not fail the testing? I would rather have the limit be 2x this, to encourage folks to make smaller more directed tests instead of massive tests that don’t actually need to be massive. If very small, + a small delta s to not harass folks with something too small.
