Sch_direct_xmit

Author: ivpg

August undefined, 2024

Websch_direct_xmit is used to attempt to transmit the packet. We’ll dive more into sch_direct_xmit shortly as it is used in the slower code path, too. The return value of sch_direct_xmit is checked for two cases: The queue is not empty (>0 returned). WebVMware の仮想マシンを使用していると、BUG_ON、ソフトロックアップのハングアップ、ハングアップしたタスク、そして WARNING: at net/sched/sch_generic.c:261 dev_watchdog+0x26b/0x280() (Not tainted) エラーが発生します。 vmxnet3 TX が繰り返 …

XenServer 7.5 crash: kernel panic - Networking - Discussions

WebApr 29, 2024 · possible deadlock in sch_direct_xmit (2) Status: upstream: reported C repro on 2024/04/29 00:59 Subsystems: net Reported-by: [email protected] First crash: 1079d, last: 92d WebAug 11, 2014 · 31. [157707.736203] general protection fault: 0000 [#1] SMP. Says that you are doing something horrible in memory (e.g dereferencing a null pointer) [157707.740102] RIP: 0010: [] [] pkt_queue+0x184/0x48a. This line is … good luck phrases funny

[PATCH net-next] qdisc: validate skb without holding lock

Web1. As a general way to investigate a slow authentication, check /etc/pam.conf and /etc/pam.d/su (and /etc/pam.d/sshd etc.) to see what kind of authentication the login services perform. Check the system logs to see if anything is logged (look for log entries … WebNov 20, 2014 · Server overloaded, acts like out of memory, but thats not true. I have a Centos 6.5 server, running QEMU-KVM virtualization: Guests are running Apache and MySQL. On the host runs just some backup and maintenance scripts beside the virtuals, nothing else. Always after a few days running, problems starts to show up. WebDec 25, 2016 · In sch_direct_xmit you can investigate the driver locking macros: HARD_TX_LOCK; HARD_TX_UNLOCK; Those are setting a spinlock protected per tx queue cpu reservation flag, or leave locking work to the driver in case NETIF_F_LLTX supported. … good luck on your new adventure image

Optimizing igb and ixgbe network driver scaling performance

Re: WARNING: bad unlock balance in sch_direct_xmit — Netdev

WebPCI-to-PDQ Interface Chip [PFI] (rev 02) Most skbuffs that come through dfx_xmit_queue_pkt () have 11 bytes. between skb->head and skb->data. On the other hand, at almost exactly. 60-second intervals, an skb arrives that has zero bytes between. skb->head and skb->data. … WebAug 29, 2024 · When sending socket to device, HARD_TX_LOCK() in sch_direct_xmit() is called to ensure only one CPU can execute it. However, sch_direct_xmit() could be re-entrant through ops->ndo_start_xmit in __netdev_start_xmit(). Such call stack is: ip_send_skb(); … good luck oxon hillWebJun 2, 2010 · net/sched/sch_generic.c, line 407 amazon-freertos arm-trusted-firmware barebox bluez busybox coreboot dpdk glibc grub linux llvm mesa musl ofono op-tee qemu toybox u-boot uclibc-ng zephyr Projects good luck on your test tomorrow

"WebSep 29, 2015 · The spin_lock call in sch_direct_xmit shows up as the number one consumer of CPU time. However the real culprit isn't the lock itself, the real cause is the MMIO write at the end of the transmit path which must be flushed in order to complete an operation with … " - Sch_direct_xmit

Sch_direct_xmit

WebJun 2, 2010 · This kernel is intended for kernel developers to use in simple virtual machines. It contains only the device drivers necessary to use a KVM virtual machine *without* device passthrough enabled. Webhuh, entered softirq 3 NET_RX 082db810 preempt_count 00000101, exited with fffefc05? Toralf Förster. 10 years ago. At a user mode linux image (unstable Gentoo) I experienced a hang. (100% CPU of the linux process), no reaction anymore. The last lines in the syslog …

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WebMay 31, 2024 · Bad news, I use the official repo, but the problem is the same. Tonight just right now it crash again, the log is here: Fri May 31 21:11:41 2024 kern.warn kernel: [14352.434931] Exception stack(0xdd461f80 to 0xdd461fc8) Fri May 31 21:11:41 2024 … WebMar 27, 2012 · From:: Arvid Brodin To: "David S. Miller" Subject: [RFC] net/hsr: Add support for IEC 62439-3 High-availability Seamless Redundancy

Web*net: deadlock between ip_expire/sch_direct_xmit @ 2024-03-14 13:31 Dmitry Vyukov 2024-03-14 14:41 ` Eric Dumazet 2024-03-22 15:57 ` [PATCH net] inet: frag: release spinlock before calling icmp_send() Eric Dumazet 0 siblings, 2 replies; 13+ messages in thread From: Dmitry Vyukov @ 2024-03-14 13:31 UTC (permalink / raw WebTCP is broken due to skb leak since no free skb will be considered as still in the host queue and never be retransmitted. This happend when dev_requeue_skb() called from qdisc_restart(). qdisc_restart -- dequeue_skb -- sch_direct_xmit() -- dev_requeue_skb() <-- skb may bluked Fix dev_requeue_skb() to requeue the full bluked list.

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WebKwiboo referenced this issue in Kwiboo/linux-rockchip on May 2, 2024. MIPS: perf: fix deadlock. …. f2b4286. Kwiboo referenced this issue in Kwiboo/linux-rockchip on May 2, 2024. netpoll: Check for skb->queue_mapping. …. c70b17b. wzyy2 pushed a commit that referenced this issue on May 23, 2024. good luck on your new job funnyWebJan 27, 2014 · Ftrace. Ftrace is the Linux kernel internal tracer that was included in the Linux kernel in 2.6.27. Although Ftrace is named after the function tracer it also includes many more functionalities. But the function tracer is the part of Ftrace that makes it unique as you can trace almost any function in the kernel and with dynamic Ftrace, it has ... good luck party invitationsWebJan 27, 2014 · Ftrace. Ftrace is the Linux kernel internal tracer that was included in the Linux kernel in 2.6.27. Although Ftrace is named after the function tracer it also includes many more functionalities. But the function tracer is the part of Ftrace that makes it unique as … good luck out there gifWebFinally, thanks to LTTng tool, I was able to locate the problem down to this peace of code in net/sched/sch_generic.c: int sch_direct_xmit(struct sk_buff *skb, struct Qdisc *q ... while still being in dev_hard_start_xmit function This thread will check if HARD_TX_LOCK is taken, and if so, go on and queue its own message ... good luck on your next adventure memeWebThe trampoline_pgd only maps the 0xfffffff000000000-0xffffffffffffffff range of kernel memory (with 4-level paging). This range contains the kernel's text+data+bss mappings and the module mapping space but not the direct mapping and the vmalloc area. good luck on your test clip artWebMar 15, 2024 · This patch calls sch_direct_xmit() to transmit the skb directly to the driver for empty lockless qdisc too, which aviod enqueuing and dequeuing operation. qdisc->empty is set to false whenever a skb is enqueued, see pfifo_fast_enqueue(), and is set to true when goodluck power solutionWebflag set, but queue discipline by-pass does not work for lockless. qdisc because skb is always enqueued to qdisc even when the qdisc. is empty, see __dev_xmit_skb (). This patch calls sch_direct_xmit () to transmit the skb directly. to the driver for empty lockless qdisc … good luck on your medical procedure