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Date:      Tue, 07 May 2024 01:11:54 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 278822] Errors in building the kernel config with its own value MSGBUF_SIZE, MCLSHIFT and NBUF
Message-ID:  <bug-278822-227-lmzY3Sw2B8@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-278822-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-278822-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D278822

--- Comment #2 from Vladyslav V. Prodan <admin@support.od.ua> ---
(In reply to Mark Johnston from comment #1)

This is how it happened historically, somewhere around release/10.
This is my attempt to allocate a lot of memory to network/buffers at once.

In FreeBSD 12.3-STABLE #0 r372168M: Sat Jun 25 20:34:53 EEST 2022:

# netstat -m
9378/4347/13725 mbufs in use (current/cache/total)
5164/3880/9044/125007 mbuf clusters in use (current/cache/total/max)
47/1477 mbuf+clusters out of packet secondary zone in use (current/cache)
0/254/254/62503 4k (page size) jumbo clusters in use (current/cache/total/m=
ax)
0/0/0/18519 9k jumbo clusters in use (current/cache/total/max)
0/0/0/10417 16k jumbo clusters in use (current/cache/total/max)
12672K/9862K/22535K bytes allocated to network (current/cache/total)
0/0/0 requests for mbufs denied (mbufs/clusters/mbuf+clusters)
0/0/0 requests for mbufs delayed (mbufs/clusters/mbuf+clusters)
0/0/0 requests for jumbo clusters delayed (4k/9k/16k)
0/0/0 requests for jumbo clusters denied (4k/9k/16k)
0 sendfile syscalls
0 sendfile syscalls completed without I/O request
0 requests for I/O initiated by sendfile
0 pages read by sendfile as part of a request
0 pages were valid at time of a sendfile request
0 pages were valid and substituted to bogus page
0 pages were requested for read ahead by applications
0 pages were read ahead by sendfile
0 times sendfile encountered an already busy page
0 requests for sfbufs denied
0 requests for sfbufs delayed

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