Date: Wed, 21 Oct 2015 15:33:21 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-xen@FreeBSD.org Subject: [Bug 154428] [xen] xn0 network interface and PF - Massive performance drop Message-ID: <bug-154428-23905-JvmOs9ckwP@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-154428-23905@https.bugs.freebsd.org/bugzilla/> References: <bug-154428-23905@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=154428 --- Comment #21 from commit-hook@freebsd.org --- A commit references this bug: Author: kp Date: Wed Oct 21 15:32:21 UTC 2015 New revision: 289703 URL: https://svnweb.freebsd.org/changeset/base/289703 Log: MFC r289316: pf: Fix TSO issues In certain configurations (mostly but not exclusively as a VM on Xen) pf produced packets with an invalid TCP checksum. The problem was that pf could only handle packets with a full checksum. The FreeBSD IP stack produces TCP packets with a pseudo-header checksum (only addresses, length and protocol). Certain network interfaces expect to see the pseudo-header checksum, so they end up producing packets with invalid checksums. To fix this stop calculating the full checksum and teach pf to only update TCP checksums if TSO is disabled or the change affects the pseudo-header checksum. PR: 154428, 193579, 198868 Relnotes: yes Sponsored by: RootBSD Changes: _U stable/10/ stable/10/sys/net/pfvar.h stable/10/sys/netpfil/pf/pf.c stable/10/sys/netpfil/pf/pf_ioctl.c stable/10/sys/netpfil/pf/pf_norm.c -- You are receiving this mail because: You are the assignee for the bug.
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