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Date:      Fri, 08 Dec 2023 13:36:28 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 275632] process being killed which has a big file mmap'ed and performs writes to it
Message-ID:  <bug-275632-227-7btjCRrUHR@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-275632-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275632

--- Comment #2 from Martin Birgmeier <d8zNeCFG@aon.at> ---
Unfortunately not really... the program itself exists since Sep. 2011, and it
was working o.k. for quite some time. In May 2019 I added sleep(3) calls and
removed them immediately afterwards - probably because the problem surfaced
then and I tried to lower the write load, seemingly unsuccessfully.

I am running this only every half a year or so. The problem certainly existed
on 12.3 and 12.4; I switched to stable/14 from 12.4.

There does not seem to be a problem if the write load is rather small; but if a
substantial portion of consecutive stretches of ca. 20 GB needs to be rewritten
the program will be killed.

The machine in question has 16 GB main memory.

-- Martin

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