Date: Mon, 26 Jun 2017 19:30:22 +0300 From: "Andrey V. Elsukov" <bu7cher@yandex.ru> To: Matt Joras <matt.joras@gmail.com> Cc: Ben RUBSON <ben.rubson@gmail.com>, FreeBSD Net <freebsd-net@freebsd.org>, Ryan Stone <rysto32@gmail.com>, "freebsd-scsi@freebsd.org" <freebsd-scsi@freebsd.org> Subject: Re: mbuf_jumbo_9k & iSCSI failing Message-ID: <f42d931e-2fba-9beb-8f8b-5ae6dd027e65@yandex.ru> In-Reply-To: <CADdTf%2BgZZwF-Lf=T79s3ps4SSOGEmt15vwpwv9ADyLAeuNOKnQ@mail.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> <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> <D0CF7BD6-C443-4707-9863-9D6ADB0B3025@gmail.com> <61f98b7d-f55d-aa0f-4aef-1bdfbc7086ff@yandex.ru> <CADdTf%2BgZZwF-Lf=T79s3ps4SSOGEmt15vwpwv9ADyLAeuNOKnQ@mail.gmail.com>
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From: "Andrey V. Elsukov" <bu7cher@yandex.ru>
To: Matt Joras <matt.joras@gmail.com>
Cc: Ben RUBSON <ben.rubson@gmail.com>, FreeBSD Net <freebsd-net@freebsd.org>,
Ryan Stone <rysto32@gmail.com>,
"freebsd-scsi@freebsd.org" <freebsd-scsi@freebsd.org>
Message-ID: <f42d931e-2fba-9beb-8f8b-5ae6dd027e65@yandex.ru>
Subject: Re: mbuf_jumbo_9k & iSCSI failing
References: <486A6DA0-54C8-40DF-8437-F6E382DA01A8@gmail.com>
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On 26.06.2017 19:26, Matt Joras wrote:
> I didn't think that ixgbe(4) still suffered from this problem, and we
> use it in the same situations rstone mentioned above. Indeed, ixgbe(4)
> doesn't presently suffer from this problem (you can see that in your
> patch, as it is only effectively changing the other drivers), though
> it used to. It looks like it was first fixed to not to in r280182.
>=20
Yes, actually we have this patch since 8.x. Recent drivers aren't
affected by this problem. iflib also has the code:
#ifndef CONTIGMALLOC_WORKS
else
fl->ifl_buf_size =3D MJUMPAGESIZE;
#else
else if (sctx->isc_max_frame_size <=3D 4096)
fl->ifl_buf_size =3D MJUMPAGESIZE;
else if (sctx->isc_max_frame_size <=3D 9216)
fl->ifl_buf_size =3D MJUM9BYTES;
else
fl->ifl_buf_size =3D MJUM16BYTES;
#endif
that seems by default doesn't use 9-16k mbufs.
--=20
WBR, Andrey V. Elsukov
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