Date: Mon, 26 Jun 2017 15:29:48 +0200 From: Ben RUBSON <ben.rubson@gmail.com> To: "Andrey V. Elsukov" <bu7cher@yandex.ru> Cc: Ryan Stone <rysto32@gmail.com>, FreeBSD Net <freebsd-net@freebsd.org>, "freebsd-scsi@freebsd.org" <freebsd-scsi@freebsd.org> Subject: Re: mbuf_jumbo_9k & iSCSI failing Message-ID: <D0CF7BD6-C443-4707-9863-9D6ADB0B3025@gmail.com> In-Reply-To: <a36014ff-0a43-93ef-52f8-2bca1388757e@yandex.ru> 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> <CAFMmRNzo=xB8XF6SFD%2BwksmBYjRZ_peYjiPBCXNVyqP%2BdxnujQ@mail.gmail.com> <CAFMmRNwbEwn=TmTAd56rViDV5nDXq_hPmTp-cDwmVqu1XYm=fA@mail.gmail.com> <64abec26-e310-d66d-93ae-3536914ddd84@yandex.ru> <86D76532-92F4-479C-A714-126D007AD91F@gmail.com> <a36014ff-0a43-93ef-52f8-2bca1388757e@yandex.ru>
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> On 26 Jun 2017, at 15:25, Andrey V. Elsukov <bu7cher@yandex.ru> wrote: >=20 > On 26.06.2017 16:27, Ben RUBSON wrote: >>=20 >>> On 26 Jun 2017, at 15:13, Andrey V. Elsukov <bu7cher@yandex.ru> = wrote: >>>=20 >>> I think it is not mlxen specific problem, we have the same symptoms = with >>> ixgbe(4) driver too. To avoid the problem we have patches that are >>> disable using of 9k mbufs, and instead only use 4k mbufs. >>=20 >> Interesting feedback Andrey, thank you ! >> The problem may be then "general". >> So you still use large MTU (>=3D9000) but only allocating 4k mbufs, = as a workaround ? >=20 > Yes. Is it a kernel patch or a driver/ixgbe patch ?=
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