Date: Tue, 24 Nov 2015 06:09:31 +0000 From: Hongjiang Zhang <honzhan@microsoft.com> To: Adrian Chadd <adrian.chadd@gmail.com> Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: RE: Is it allowed to copy hyper-v drivers from FreeBSD 10 and packed it into FreeBSD 9.2 Message-ID: <ac15881eeed5419d9f91a6029da3281c@SG2PR3002MB0106.064d.mgd.msft.net> In-Reply-To: <CAJ-Vmone_fa8Z1BGn68btfF5iY3kDkn1jDEpisyBHFJeDZgjZA@mail.gmail.com> References: <a3ff0bfe18c64a4cb8fdda778fb58a24@SG2PR3002MB0106.064d.mgd.msft.net> <CAJ-Vmone_fa8Z1BGn68btfF5iY3kDkn1jDEpisyBHFJeDZgjZA@mail.gmail.com>
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Thanks. Enabling TSO can make the issue easily occur. Well, this is just a clue. The back port is not done by me, and the people who did that because their system is based on 9.2, and it takes a lot of effort to upgrade FreeBSD system. -----Original Message----- From: Adrian Chadd [mailto:adrian.chadd@gmail.com] Sent: 2015年11月23日 23:31 To: Hongjiang Zhang <honzhan@microsoft.com> Cc: freebsd-net@freebsd.org Subject: Re: Is it allowed to copy hyper-v drivers from FreeBSD 10 and packed it into FreeBSD 9.2 On 22 November 2015 at 21:58, Hongjiang Zhang <honzhan@microsoft.com> wrote: > Hi, > > Some people, who used FreeBSD 9.2 and back-port network driver for Hyper-v from FreeBSD 10, encountered a network issue. They installed 2 VM (FreeBSD 9.2 with the customized FreeBSD kernel) on Azure. Network went offline very soon when the big file (~320M byte) is copied from one VM to anther through "scp". If TSO is disabled through "sysctl -w net.inet.tcp.tso=0", this issue will be alleviated but cannot be eliminated. I did not figure out why. > > I have checked the release notes of FreeBSD 9.2/9.3/10, but did not find anything which blocked the back-port. It is supposed 9.2 allows the back-ported Hyper-v drivers from 10. Is this assumption correct? Hi! It may be something to do with maximum mbufs per packet or some other limit like that. Is there a lot of interest in backporting the latest hyperv driver to 9.2? -a > _______________________________________________ > freebsd-net@freebsd.org mailing list > https://na01.safelinks.protection.outlook.com/?url=https%3a%2f%2flists > .freebsd.org%2fmailman%2flistinfo%2ffreebsd-net&data=01%7c01%7chonzhan > %40064d.mgd.microsoft.com%7c1bc312a0449d4fb61bc708d2f41b07db%7c72f988b > f86f141af91ab2d7cd011db47%7c1&sdata=bNEhroIlwhoTHyG3bhHlQ2DYJY5FWMi8A1 > 23TVeZ7Dc%3d To unsubscribe, send any mail to > "freebsd-net-unsubscribe@freebsd.org"
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