Date: Sun, 25 Apr 2021 15:18:05 +0200 From: Juraj Lutter <otis@FreeBSD.org> To: Rick Macklem <rmacklem@uoguelph.ca> Cc: Chris Roose <chrisroose@fastmail.com>, "freebsd-current@freebsd.org" <freebsd-current@freebsd.org> Subject: Re: NFS issues since upgrading to 13-RELEASE Message-ID: <CB6997AE-F6B5-453C-B348-05191305267F@FreeBSD.org> In-Reply-To: <YQXPR0101MB09685508380CC691A95898BDDD439@YQXPR0101MB0968.CANPRD01.PROD.OUTLOOK.COM> References: <CABW2x9ooC0w4_50Rd3XfLQdKXrUtJEty6mbYmyMSAk7%2BWyyDpA@mail.gmail.com> <089ce08a-1c77-b7a5-4e20-b1c22df23176@fastmail.com> <YQXPR0101MB09685508380CC691A95898BDDD439@YQXPR0101MB0968.CANPRD01.PROD.OUTLOOK.COM>
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> On 25 Apr 2021, at 15:06, Rick Macklem <rmacklem@uoguelph.ca> wrote: >=20 > 2 - TSO does work correctly, but results in different timing of the = TCP > segments transmitted for the segment compared with non-TSO. >=20 > I believe that, for otis@, disabling TSO reduced the frequency of = Linux > client hangs, but did not stop them. > --> reverting the patch in r367492 (this patch is not in FreeBSD12) = has > fixed the problem for him. >=20 Correct. Reverting the patch in r367492 has made the system stable and = usable (thanks, Rick!). We also have disabled LRO and TSO on the interfaces serving the NFS = traffic, it also might have added up to the stability. There is some more work going on in Phabricator (D29690) that we also = want to test. otis =E2=80=94 Juraj Lutter otis@FreeBSD.org
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