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Date:      Sun, 28 Mar 2021 11:52:28 +0000
From:      bugzilla-noreply@freebsd.org
To:        net@FreeBSD.org
Subject:   [Bug 254333] [tcp] sysctl net.inet.tcp.hostcache.list hangs
Message-ID:  <bug-254333-7501-pJOzy8ZG1s@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-254333-7501@https.bugs.freebsd.org/bugzilla/>
References:  <bug-254333-7501@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D254333

--- Comment #6 from Richard Scheffenegger <rscheff@freebsd.org> ---
Also, as a quick workaround:

What is the output of sysctl net.inet.tcp.hostcache

and the above problem about the waiting for a contingeous chunk of kernel
memory could be reduced, by restricting net.inet.tcp.hostcache.cachelimit
(the output tries to allocate (net.inet.tcp.hostcache.count+1)*128 bytes. W=
ith
a full hostcache this is almost a 2 MB memory chunk (on my system, the limi=
t is
15360).

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