RE: [ANNOUNCE] Git v2.32.0-rc3 - t5300 Still Broken on NonStop ia64/x86

On June 3, 2021 3:31 PM, Peff wrote:

On Wed, Jun 02, 2021 at 04:34:51PM -0400, Randall S. Becker wrote:

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The wrapper should apply to all platforms.  NFS (and presumably
other network FSes) can be mounted with interrupts enabled.

I don't mind that, as the wrapper is pretty low-cost (and one less
Makefile knob is nice). If it's widespread, though, I find it curious that nobody has run into it before now.

I suspect this is because of the way the file system on NonStop behaves. It is a multi-processor platform, with multi-cores, so anything

can happen. If the file system is delayed for any reason, like a signal coming from a different core (EINTR has high priority), then fsync()
will be interrupted. EINTR is allowed on NonStop for fsync(). So it would be really great if the patch included a modification to
config.mak.uname to include that. This would be a timing-only issue on most other systems, probably something that would hit NFS.

quoted

The patch for the config is:

diff --git a/config.mak.uname b/config.mak.uname index

cb443b4e02..ac3e3ca2c5 100644

--- a/config.mak.uname
+++ b/config.mak.uname

@@ -566,6 +566,7 @@ ifeq ($(uname_S),NONSTOP_KERNEL)
        NO_REGEX = NeedsStartEnd
        NO_PTHREADS = UnfortunatelyYes
        FREAD_READS_DIRECTORIES = UnfortunatelyYes
+       FSYNC_NEEDS_RESTART = YesPlease

        # Not detected (nor checked for) by './configure'.

Yeah, if we don't make it unconditional, then this is the obvious next step. But the more important question is: did you test this out and did
it fix the test breakage you saw on NonStop?

The fix works for me and t5300 passes. I tested it without the conditional approach. While the test was running, I noticed this:

+ mkdir -p /home/git/git/t/trash directory.t5300-pack-object/prereq-test-dir-FAIL_PREREQS
+ cd /home/git/git/t/trash directory.t5300-pack-object/prereq-test-dir-FAIL_PREREQS
+ test_bool_env GIT_TEST_FAIL_PREREQS false
error: last command exited with $?=1
prerequisite FAIL_PREREQS not satisfied
expecting success of 5300.32 'index-pack --threads=N or pack.threads=N warns when no pthreads':

This may be intended, but the error line showed in red.

Regards,
Randall