Re: [PATCH v2 0/5] Fix the racy split index problem

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On Thu, Sep 27 2018, SZEDER Gábor wrote:

> On Thu, Sep 27, 2018 at 03:53:24PM +0200, Ævar Arnfjörð Bjarmason wrote:
>>
>> On Thu, Sep 27 2018, SZEDER Gábor wrote:
>>
>> > This is the second attempt to fix the racy split index problem, which
>> > causes occasional failures in several random test scripts when run
>> > with 'GIT_TEST_SPLIT_INDEX=yes'.  The important details are in patches
>> > 1 and 5 (corresponding to v1's 3 and 5).
>>
>> Thanks. I'm running the same sorts of tests I noted in
>> https://public-inbox.org/git/87va7ireuu.fsf@xxxxxxxxxxxxxxxxxxx/ on
>> this. The fix Jeff had that you noted in
>> https://public-inbox.org/git/20180906151439.GA8016@localhost/ is now in
>> "master".
>>
>> I take it your
>> https://github.com/szeder/git/commits/racy-split-index-fix is the same
>> as this submission?
>
> Yes.
>
>> Anyway, I'm testing that cherry-picked on top of the
>> latest master.
>>
>> Unfortunate that we couldn't get the isolated test you made in
>> https://public-inbox.org/git/20180907034942.GA10370@localhost/
>
> Nah, that's not an isolated test case, that's only a somewhat
> narrowed-down, but rather reliable reproduction recipe while I still
> had no idea what was going on :)
>
> The _real_ isolated test is the last test in t1701, that's what it
> eventually boiled down to.

Thanks. I had ~400 runs of the tests I ran before and they were all
OK. Now trying also with t1701 (which I hadn't noticed was a new
test...).


>> but I
>> don't see how it could be added without some very liberal
>> getenv("GIT_TEST_blahblah"), so it's probably best to not add it,
>> particularly with the C rewrite of git-stash in-flight.
>>
>> I'll report back when I have enough test data to say how these patches
>> affect the intermittent test failures under GIT_TEST_SPLIT_INDEX=yes.



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