Date: Sun, 25 Jun 2017 11:14:07 -0400 From: Ryan Stone <rysto32@gmail.com> To: Ben RUBSON <ben.rubson@gmail.com> Cc: FreeBSD Net <freebsd-net@freebsd.org>, "freebsd-scsi@freebsd.org" <freebsd-scsi@freebsd.org> Subject: Re: mbuf_jumbo_9k & iSCSI failing Message-ID: <CAFMmRNzo=xB8XF6SFD%2BwksmBYjRZ_peYjiPBCXNVyqP%2BdxnujQ@mail.gmail.com> In-Reply-To: <9B507AA6-40FE-4B8D-853F-2A9422A2DF67@gmail.com> References: <486A6DA0-54C8-40DF-8437-F6E382DA01A8@gmail.com> <6a31ef00-5f7a-d36e-d5e6-0414e8b813c7@selasky.org> <DB3PR05MB089A5789A0A619FA8B7CA36C36C0@DB3PR05MB089.eurprd05.prod.outlook.com> <613AFD8E-72B2-4E3F-9C70-1D1E43109B8A@gmail.com> <2c9a9c2652a74d8eb4b34f5a32c7ad5c@AM5PR0502MB2916.eurprd05.prod.outlook.com> <DB3PR05MB089011A41EF87A40C7AC741C36E0@DB3PR05MB089.eurprd05.prod.outlook.com> <F19B51C7-7DDD-4FAB-9091-0B7C8A7CE649@gmail.com> <52A2608C-A57E-4E75-A952-F4776BA23CA4@gmail.com> <9B507AA6-40FE-4B8D-853F-2A9422A2DF67@gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Is this setup using the mlx4_en driver? If so, recent versions of that driver has a regression when using MTUs greater than the page size (4096 on i386/amd64). The bug will cause the card to drop packets when the system is under memory pressure, and in certain causes the card can get into a state when it is no longer able to receive packets. I am working on a fix; I can post a patch when it's complete.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?CAFMmRNzo=xB8XF6SFD%2BwksmBYjRZ_peYjiPBCXNVyqP%2BdxnujQ>