Package: src:linux Version: 3.2.23-1 Severity: important Dear Maintainer,
A regression appearing upstream after 2.6.38 (so not in squeeze) appears in wheezy. The fix is in the upstream 3.2.y stable Linux kernel maintained by Ben Hutchings, so it's probably on its way into wheezy, but I didn't see any bug for it, so I figured I'd reach out. Here is the commit from 3.2.y, with the changelog describing the user impact, felt most keenly by debian users who download the open source aoe driver directly from coraid.com. It includes the simple fix. commit 9d222e395fc51081a77bac4168141e289dff2d4b Author: Ed Cashin <ecas...@coraid.com> Date: Wed Sep 19 15:49:00 2012 +0000 net: do not disable sg for packets requiring no checksum [ Upstream commit c0d680e577ff171e7b37dbdb1b1bf5451e851f04 ] A change in a series of VLAN-related changes appears to have inadvertently disabled the use of the scatter gather feature of network cards for transmission of non-IP ethernet protocols like ATA over Ethernet (AoE). Below is a reference to the commit that introduces a "harmonize_features" function that turns off scatter gather when the NIC does not support hardware checksumming for the ethernet protocol of an sk buff. commit f01a5236bd4b140198fbcc550f085e8361fd73fa Author: Jesse Gross <je...@nicira.com> Date: Sun Jan 9 06:23:31 2011 +0000 net offloading: Generalize netif_get_vlan_features(). The can_checksum_protocol function is not equipped to consider a protocol that does not require checksumming. Calling it for a protocol that requires no checksum is inappropriate. The patch below has harmonize_features call can_checksum_protocol when the protocol needs a checksum, so that the network layer is not forced to perform unnecessary skb linearization on the transmission of AoE packets. Unnecessary linearization results in decreased performance and increased memory pressure, as reported here: http://www.spinics.net/lists/linux-mm/msg15184.html The problem has probably not been widely experienced yet, because only recently has the kernel.org-distributed aoe driver acquired the ability to use payloads of over a page in size, with the patchset recently included in the mm tree: https://lkml.org/lkml/2012/8/28/140 The coraid.com-distributed aoe driver already could use payloads of greater than a page in size, but its users generally do not use the newest kernels. Signed-off-by: Ed Cashin <ecas...@coraid.com> Signed-off-by: David S. Miller <da...@davemloft.net> Signed-off-by: Ben Hutchings <b...@decadent.org.uk> diff --git a/net/core/dev.c b/net/core/dev.c index 611294a..abe1147 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2108,7 +2108,8 @@ static bool can_checksum_protocol(unsigned long features, __be16 protocol) static u32 harmonize_features(struct sk_buff *skb, __be16 protocol, u32 features) { - if (!can_checksum_protocol(features, protocol)) { + if (skb->ip_summed != CHECKSUM_NONE && + !can_checksum_protocol(features, protocol)) { features &= ~NETIF_F_ALL_CSUM; features &= ~NETIF_F_SG; } else if (illegal_highdma(skb->dev, skb)) { -- Package-specific info: ** Version: Linux version 3.2.0-3-amd64 (Debian 3.2.23-1) (debian-ker...@lists.debian.org) (gcc version 4.6.3 (Debian 4.6.3-8) ) #1 SMP Mon Jul 23 02:45:17 UTC 2012 ** Command line: BOOT_IMAGE=/boot/vmlinuz-3.2.0-3-amd64 root=UUID=4cb7446d-c561-4184-b8ec-486ef365455b ro quiet ** Not tainted ** Kernel log: [ 0.801610] acpiphp: Slot [30] registered [ 0.801693] acpiphp: Slot [31] registered [ 0.802476] intel_idle: does not run on family 6 model 15 [ 0.802532] ERST: Table is not found! [ 0.802535] GHES: HEST is not enabled! [ 0.802660] xen: --> pirq=22 -> irq=28 (gsi=28) [ 0.802666] xen-platform-pci 0000:00:03.0: PCI INT A -> GSI 28 (level, low) -> IRQ 28 [ 0.804744] Grant table initialized [ 0.809132] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled [ 0.839167] serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A [ 0.894633] 00:0a: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A [ 0.904439] Linux agpgart interface v0.103 [ 0.904599] i8042: PNP: PS/2 Controller [PNP0303:PS2K,PNP0f13:PS2M] at 0x60,0x64 irq 1,12 [ 0.906591] serio: i8042 KBD port at 0x60,0x64 irq 1 [ 0.906603] serio: i8042 AUX port at 0x60,0x64 irq 12 [ 0.906968] mousedev: PS/2 mouse device common for all mice [ 0.907810] input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input0 [ 0.908587] rtc_cmos 00:05: rtc core: registered rtc_cmos as rtc0 [ 0.908630] rtc0: alarms up to one day, 114 bytes nvram [ 0.908645] cpuidle: using governor ladder [ 0.908648] cpuidle: using governor menu [ 0.908933] TCP cubic registered [ 0.909141] NET: Registered protocol family 10 [ 0.909843] Mobile IPv6 [ 0.909848] NET: Registered protocol family 17 [ 0.909854] Registering the dns_resolver key type [ 0.910274] PM: Hibernation image not present or could not be loaded. [ 0.910301] registered taskstats version 1 [ 0.915641] XENBUS: Device with no driver: device/vfb/0 [ 0.915646] XENBUS: Device with no driver: device/vbd/768 [ 0.915650] XENBUS: Device with no driver: device/vif/0 [ 0.915659] XENBUS: Device with no driver: device/console/0 [ 0.915755] rtc_cmos 00:05: setting system clock to 2012-11-01 14:41:05 UTC (1351780865) [ 0.915795] Initializing network drop monitor service [ 0.917400] Freeing unused kernel memory: 572k freed [ 0.917674] Write protecting the kernel read-only data: 6144k [ 0.920494] Freeing unused kernel memory: 668k freed [ 0.923488] Freeing unused kernel memory: 684k freed [ 1.109965] udevd[49]: starting version 175 [ 1.192878] SCSI subsystem initialized [ 1.232247] libata version 3.00 loaded. [ 1.233203] ata_piix 0000:00:01.1: version 2.13 [ 1.233563] ata_piix 0000:00:01.1: setting latency timer to 64 [ 1.243055] scsi0 : ata_piix [ 1.250470] scsi1 : ata_piix [ 1.250558] ata1: PATA max MWDMA2 cmd 0x1f0 ctl 0x3f6 bmdma 0xc200 irq 14 [ 1.250563] ata2: PATA max MWDMA2 cmd 0x170 ctl 0x376 bmdma 0xc208 irq 15 [ 1.527792] Initialising Xen virtual ethernet driver. [ 1.545930] FDC 0 is a S82078B [ 1.569014] blkfront: xvda: flush diskcache: enabled [ 1.572905] xvda: xvda1 xvda2 < xvda5 > [ 1.764162] Refined TSC clocksource calibration: 2327.581 MHz. [ 1.873612] device-mapper: uevent: version 1.0.3 [ 1.873862] device-mapper: ioctl: 4.22.0-ioctl (2011-10-19) initialised: dm-de...@redhat.com [ 1.929873] PM: Starting manual resume from disk [ 1.929879] PM: Hibernation image partition 202:5 present [ 1.929882] PM: Looking for hibernation image. [ 1.930041] PM: Image not found (code -22) [ 1.930044] PM: Hibernation image not present or could not be loaded. [ 1.950467] EXT4-fs (xvda1): mounted filesystem with ordered data mode. Opts: (null) [ 4.021192] udevd[389]: starting version 175 [ 4.533418] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input1 [ 4.533428] ACPI: Power Button [PWRF] [ 4.533534] input: Sleep Button as /devices/LNXSYSTM:00/LNXSLPBN:00/input/input2 [ 4.533540] ACPI: Sleep Button [SLPF] [ 4.822719] parport_pc 00:0b: reported by Plug and Play ACPI [ 4.823934] parport0: PC-style at 0x378, irq 7 [PCSPP,TRISTATE] [ 4.872769] input: PC Speaker as /devices/platform/pcspkr/input/input3 [ 5.002240] piix4_smbus 0000:00:01.3: SMBus base address uninitialized - upgrade BIOS or use force_addr=0xaddr [ 5.382584] input: ImExPS/2 Generic Explorer Mouse as /devices/platform/i8042/serio1/input/input4 [ 10.707695] Adding 901116k swap on /dev/xvda5. Priority:-1 extents:1 across:901116k SS [ 10.768993] EXT4-fs (xvda1): re-mounted. Opts: (null) [ 10.984767] EXT4-fs (xvda1): re-mounted. Opts: errors=remount-ro [ 11.243003] loop: module loaded [ 13.992054] RPC: Registered named UNIX socket transport module. [ 13.992059] RPC: Registered udp transport module. [ 13.992113] RPC: Registered tcp transport module. [ 13.992116] RPC: Registered tcp NFSv4.1 backchannel transport module. [ 14.019822] FS-Cache: Loaded [ 14.044928] FS-Cache: Netfs 'nfs' registered for caching [ 14.064130] Installing knfsd (copyright (C) 1996 o...@monad.swb.de). [ 19.501916] lp0: using parport0 (interrupt-driven). [ 19.523994] ppdev: user-space parallel port driver [ 19.667626] Bluetooth: Core ver 2.16 [ 19.667655] NET: Registered protocol family 31 [ 19.667659] Bluetooth: HCI device and connection manager initialized [ 19.667663] Bluetooth: HCI socket layer initialized [ 19.667667] Bluetooth: L2CAP socket layer initialized [ 19.667681] Bluetooth: SCO socket layer initialized [ 19.734817] Bluetooth: RFCOMM TTY layer initialized [ 19.734825] Bluetooth: RFCOMM socket layer initialized [ 19.734829] Bluetooth: RFCOMM ver 1.11 [ 19.779687] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 19.779692] Bluetooth: BNEP filters: protocol multicast [ 21.737812] mtrr: no MTRR for f0000000,100000 found [ 22.196601] Ebtables v2.0 registered [ 22.280569] ip_tables: (C) 2000-2006 Netfilter Core Team [ 22.320806] ip6_tables: (C) 2000-2006 Netfilter Core Team [ 30.848160] eth0: no IPv6 routers present [ 77.413372] colord-sane[3382]: segfault at 0 ip 00007fdff4a8e884 sp 00007fff0a324820 error 4 in libc-2.13.so[7fdff49e9000+17d000] ** Model information sys_vendor: Xen product_name: HVM domU product_version: 4.1.3 chassis_vendor: Xen chassis_version: bios_vendor: Xen bios_version: 4.1.3 ** Loaded modules: ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables bnep rfcomm bluetooth rfkill ppdev lp binfmt_misc nfsd nfs nfs_acl auth_rpcgss fscache lockd sunrpc loop i2c_piix4 i2c_core psmouse serio_raw pcspkr evdev parport_pc parport processor button thermal_sys ext4 crc16 jbd2 mbcache dm_mod xen_blkfront xen_netfront floppy ata_generic ata_piix libata scsi_mod ** PCI devices: 00:00.0 Host bridge [0600]: Intel Corporation 440FX - 82441FX PMC [Natoma] [8086:1237] (rev 02) Subsystem: Red Hat, Inc Qemu virtual machine [1af4:1100] Physical Slot: 0 Control: I/O- Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0 00:01.0 ISA bridge [0601]: Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II] [8086:7000] Subsystem: Red Hat, Inc Qemu virtual machine [1af4:1100] Physical Slot: 1 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0 00:01.1 IDE interface [0101]: Intel Corporation 82371SB PIIX3 IDE [Natoma/Triton II] [8086:7010] (prog-if 80 [Master]) Subsystem: XenSource, Inc. Device [5853:0001] Physical Slot: 1 Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 64 Region 0: [virtual] Memory at 000001f0 (32-bit, non-prefetchable) [size=8] Region 1: [virtual] Memory at 000003f0 (type 3, non-prefetchable) [size=1] Region 2: [virtual] Memory at 00000170 (32-bit, non-prefetchable) [size=8] Region 3: [virtual] Memory at 00000370 (type 3, non-prefetchable) [size=1] Region 4: I/O ports at c200 [size=16] Kernel driver in use: ata_piix 00:01.3 Bridge [0680]: Intel Corporation 82371AB/EB/MB PIIX4 ACPI [8086:7113] (rev 01) Subsystem: Red Hat, Inc Qemu virtual machine [1af4:1100] Physical Slot: 1 Control: I/O- Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0 Interrupt: pin A routed to IRQ 9 00:02.0 VGA compatible controller [0300]: Cirrus Logic GD 5446 [1013:00b8] (prog-if 00 [VGA controller]) Subsystem: XenSource, Inc. Device [5853:0001] Physical Slot: 2 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0 Region 0: Memory at f0000000 (32-bit, prefetchable) [size=32M] Region 1: Memory at f3000000 (32-bit, non-prefetchable) [size=4K] Expansion ROM at <unassigned> [disabled] 00:03.0 Unassigned class [ff80]: XenSource, Inc. Xen Platform Device [5853:0001] (rev 01) Subsystem: XenSource, Inc. Xen Platform Device [5853:0001] Physical Slot: 3 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0 Interrupt: pin A routed to IRQ 28 Region 0: I/O ports at c000 [size=256] Region 1: Memory at f2000000 (32-bit, prefetchable) [size=16M] Kernel driver in use: xen-platform-pci ** Sound cards: -- System Information: Debian Release: wheezy/sid APT prefers testing APT policy: (500, 'testing') Architecture: amd64 (x86_64) Kernel: Linux 3.2.0-3-amd64 (SMP w/2 CPU cores) Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968) Shell: /bin/sh linked to /bin/dash Versions of packages linux-image-3.2.0-3-amd64 depends on: ii debconf [debconf-2.0] 1.5.46 ii initramfs-tools [linux-initramfs-tool] 0.109 ii kmod 9-2 ii linux-base 3.5 ii module-init-tools 9-2 Versions of packages linux-image-3.2.0-3-amd64 recommends: pn firmware-linux-free <none> Versions of packages linux-image-3.2.0-3-amd64 suggests: pn debian-kernel-handbook <none> ii grub-pc 1.99-23 pn linux-doc-3.2 <none> Versions of packages linux-image-3.2.0-3-amd64 is related to: pn firmware-atheros <none> pn firmware-bnx2 <none> pn firmware-bnx2x <none> pn firmware-brcm80211 <none> pn firmware-intelwimax <none> pn firmware-ipw2x00 <none> pn firmware-ivtv <none> pn firmware-iwlwifi <none> pn firmware-libertas <none> pn firmware-linux <none> pn firmware-linux-nonfree <none> pn firmware-myricom <none> pn firmware-netxen <none> pn firmware-qlogic <none> pn firmware-ralink <none> pn firmware-realtek <none> pn xen-hypervisor <none> -- debconf information: linux-image-3.2.0-3-amd64/postinst/depmod-error-initrd-3.2.0-3-amd64: false linux-image-3.2.0-3-amd64/postinst/ignoring-ramdisk: linux-image-3.2.0-3-amd64/postinst/missing-firmware-3.2.0-3-amd64: linux-image-3.2.0-3-amd64/prerm/removing-running-kernel-3.2.0-3-amd64: true -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". 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