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Date:      Fri, 14 Dec 2012 16:39:42 +0200
From:      Andriy Gapon <avg@FreeBSD.org>
To:        Alexander Yerenkow <yerenkow@gmail.com>
Cc:        freebsd-current <freebsd-current@FreeBSD.org>
Subject:   Re: Reproduceable hang
Message-ID:  <50CB3A2E.7030407@FreeBSD.org>
In-Reply-To: <CAPJF9w=kmx4pEw0RkttMbqG5ipw3dy7maMm-2hSfqq6Gtr0cXQ@mail.gmail.com>
References:  <CAPJF9wn9%2B=O8SwE1%2Bw30yYY-AN_M6QDoRfw2Q4jumB2Qr=si0Q@mail.gmail.com> <CAPJF9wn5BkfF7mmReG8tpxZakj3icAOugvYeYV5bbbGhAFJYnQ@mail.gmail.com> <50C9B33C.9020505@FreeBSD.org> <CAPJF9w=kmx4pEw0RkttMbqG5ipw3dy7maMm-2hSfqq6Gtr0cXQ@mail.gmail.com>

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on 14/12/2012 14:46 Alexander Yerenkow said the following:
> Setup: ESXi 5.1.0
> Seems this happens when vmmemctl.ko loaded (from their latest vmtools), and when
> you give a bit more memory than there is free.

This is weird... As I can see in os_kmem_alloc function (in
modules/freebsd/vmmemctl/os.c of /usr/ports/emulators/open-vm-tools port), the
object lock is correctly acquired there.  I suspect some binary incompatibility
between the module and your kernel.  Try to recompile the module again using the
same source tree tree and the option.

> 2012/12/13 Andriy Gapon <avg@freebsd.org <mailto:avg@freebsd.org>>
> 
>     on 13/12/2012 12:46 Alexander Yerenkow said the following:
>     > 2012/12/13 Alexander Yerenkow <yerenkow@gmail.com <mailto:yerenkow@gmail.com>>
>     >
>     >> Hello there.
>     >> I have here 100% reproduceable hangs when run one custom java program.
>     >> Can someone look into?
>     >>
>     >> I can give some more info (some other trace) if required.
>     >>
>     >>
>     >
>     >
>     > If someone didn't get attachment - here's link to screenshot
>     >
>     > https://www.box.com/s/fir8ntjc4rjq5xv0vbyl
> 
>     Looks like either a bug or an "out-of-sync" issue in whatever (virtualization?)
>     driver that has function OS_ReservedPageAlloc.

-- 
Andriy Gapon



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