Date: Thu, 21 May 2020 01:04:16 +0000 From: Rick Macklem <rmacklem@uoguelph.ca> To: "freebsd-current@FreeBSD.org" <freebsd-current@FreeBSD.org> Cc: Konstantin Belousov <kib@FreeBSD.org>, "rlibby@freebsd.org" <rlibby@freebsd.org> Subject: r358252 causes intermittent hangs where processes are stuck sleeping on btalloc Message-ID: <QB1PR01MB36496B9C1B6CEE512757B039DDB70@QB1PR01MB3649.CANPRD01.PROD.OUTLOOK.COM>
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Hi, Since I hadn't upgraded a kernel through the winter, it took me a while to bisect this, but r358252 seems to be the culprit. If I do a kernel build over NFS using my not so big Pentium 4 (single core, 1.25Gbytes RAM, i386), about every second attempt will hang. When I do a "ps" in the debugger, I see processes sleeping on btalloc. If I revert to r358251, I cannot reproduce this. Any ideas? I can easily test any change you might suggest to see if it fixes the problem. If you want more debug info, let me know, since I can easily reproduce it. Thanks, rick
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