- 09 10月, 2008 1 次提交
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由 Jarek Poplawski 提交于
After the last change of requeuing there is no info about such incidents in tc stats. This patch updates the counter, but we should consider this should differ from previous stats because of additional checks preventing to repeat this. On the other hand, previous stats didn't include requeuing of gso_segmented skbs. Signed-off-by: NJarek Poplawski <jarkao2@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 07 10月, 2008 2 次提交
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由 Jarek Poplawski 提交于
qdisc->requeue was planned to universally replace all requeuing code, but at the top level we never requeue more than one skb, so qdisc-> gso_skb is enough for this. qdisc->requeue would be used on the lower levels only for one level deep requeuing (like in sch_hfsc) after finishing all the changes. Signed-off-by: NJarek Poplawski <jarkao2@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Jarek Poplawski 提交于
Jay Cliburn noticed and diagnosed a bug triggered in dev_gso_skb_destructor() after last change from qdisc->gso_skb to qdisc->requeue list. Since gso_segmented skbs can't be queued to another list this patch brings back qdisc->gso_skb for them. Reported-by: NJay Cliburn <jcliburn@gmail.com> Signed-off-by: NJarek Poplawski <jarkao2@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 23 9月, 2008 3 次提交
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由 Jarek Poplawski 提交于
Check in dequeue_skb() the state of tx_queue for requeued skb to save on locking and re-requeuing, and possibly remove the current check in qdisc_run(). Based on the idea of Alexander Duyck. Signed-off-by: NJarek Poplawski <jarkao2@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
There is no reason to call into the complicated qdiscs just to remember the last SKB where we found the device blocked. The SKB is outside of the qdiscs realm at this point. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
The idea is that we can use this to get rid of ->requeue(). Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 17 9月, 2008 1 次提交
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由 Arjan van de Ven 提交于
this patch turns the netdev timeout WARN_ON_ONCE() into a WARN_ONCE(), so that the device and driver names are inside the warning message. This helps automated tools like kerneloops.org to collect the data and do statistics, as well as making it more likely that humans cut-n-paste the important message as part of a bugreport. Signed-off-by: NArjan van de Ven <arjan@linux.intel.com> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 09 9月, 2008 1 次提交
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由 Arjan van de Ven 提交于
this patch turns the netdev timeout WARN_ON_ONCE() into a WARN_ONCE(), so that the device and driver names are inside the warning message. This helps automated tools like kerneloops.org to collect the data and do statistics, as well as making it more likely that humans cut-n-paste the important message as part of a bugreport. Signed-off-by: NArjan van de Ven <arjan@linux.intel.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 27 8月, 2008 1 次提交
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由 Jarek Poplawski 提交于
These pointers are RCU protected, so proper primitives should be used. Signed-off-by: NJarek Poplawski <jarkao2@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 22 8月, 2008 1 次提交
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由 Jarek Poplawski 提交于
Since some qdiscs call qdisc_tree_decrease_qlen() (so qdisc_lookup()) without rtnl_lock(), adding and deleting from a qdisc list needs additional locking. This patch adds global spinlock qdisc_list_lock and wrapper functions for modifying the list. It is considered as a temporary solution until hfsc_dequeue(), netem_dequeue() and tbf_dequeue() (or qdisc_tree_decrease_qlen()) are redone. With feedback from Herbert Xu and David S. Miller. Signed-off-by: NJarek Poplawski <jarkao2@gmail.com> Acked-by: NHerbert Xu <herbert@gondor.apana.org.au> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 19 8月, 2008 1 次提交
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由 David S. Miller 提交于
Based upon reports by Denys Fedoryshchenko, and feedback and help from Jarek Poplawski and Herbert Xu. We always either: 1) Never made an external reference to this qdisc. or 2) Did a dev_deactivate() which purged all asynchronous references. So do not lock the qdisc when we call qdisc_destroy(), it's illegal anyways as when we drop the lock this is free'd memory. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 18 8月, 2008 3 次提交
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由 David S. Miller 提交于
We can now kill them synchronously with all of the previous dev_deactivate() cures. This makes netdev destruction and shutdown saner as the qdiscs hold references to the device. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
The condition under which the previous qdisc has no more references after we've attached &noop_qdisc is that both RUNNING and SCHED are both seen clear while holding the root lock. So just make specifically that check in the polling loop, instead of this overly complex "check without then check with lock held" sequence. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
This new state lets dev_deactivate() mark a qdisc as having been deactivated. dev_queue_xmit() and ing_filter() check for this bit and do not try to process the qdisc if the bit is set. dev_deactivate() polls the qdisc after setting the bit, waiting for both __QDISC_STATE_RUNNING and __QDISC_STATE_SCHED to clear. This isn't perfect yet, but subsequent changesets will make it so. This part is just one piece of the puzzle. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 14 8月, 2008 1 次提交
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由 David S. Miller 提交于
Based upon discussions with Jarek P. and Herbert Xu. First, we're testing the wrong qdisc. We just reset the device queue qdiscs to &noop_qdisc and checking it's state is completely pointless here. We want to wait until the previous qdisc that was sitting at the ->qdisc pointer is not busy any more. And that would be ->qdisc_sleeping. Because of how we propagate the samples qdisc pointer down into qdisc_run and friends via per-cpu ->output_queue and netif_schedule, we have to wait also for the __QDISC_STATE_SCHED bit to clear as well. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 03 8月, 2008 1 次提交
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由 David S. Miller 提交于
Based upon a bug report by Jeff Kirsher. Don't use qdisc_root_lock() in these cases as the root qdisc could have been changed, and we'd thus lock the wrong object. Tested by Emil S Tantilov who confirms that this seems to fix the problem. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 01 8月, 2008 1 次提交
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由 David S. Miller 提交于
When support for multiple TX queues were added, the netif_tx_lock() routines we converted to iterate over all TX queues and grab each queue's spinlock. This causes heartburn for lockdep and it's not a healthy thing to do with lots of TX queues anyways. So modify this to use a top-level lock and a "frozen" state for the individual TX queues. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 30 7月, 2008 1 次提交
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由 David S. Miller 提交于
Bug report from Steven Jan Springl: Issuing the following command causes a kernel oops: tc qdisc add dev eth0 handle ffff: ingress The problem mostly stems from all of the special case handling of ingress qdiscs. So, to fix this, do the grafting operation the same way we do for TX qdiscs. Which means that dev_activate() and dev_deactivate() now do the "qdisc_sleeping <--> qdisc" transitions on dev->rx_queue too. Future simplifications are possible now, mainly because it is impossible for dev_queue->{qdisc,qdisc_sleeping} to be NULL. There are NULL checks all over to handle the ingress qdisc special case that used to exist before this commit. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 26 7月, 2008 1 次提交
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由 Ilpo Järvinen 提交于
Removes legacy reinvent-the-wheel type thing. The generic machinery integrates much better to automated debugging aids such as kerneloops.org (and others), and is unambiguous due to better naming. Non-intuively BUG_TRAP() is actually equal to WARN_ON() rather than BUG_ON() though some might actually be promoted to BUG_ON() but I left that to future. I could make at least one BUILD_BUG_ON conversion. Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 25 7月, 2008 1 次提交
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由 David S. Miller 提交于
Qdisc locks need to be held with BH disabled. Tested-by: NIngo Molnar <mingo@elte.hu> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 22 7月, 2008 3 次提交
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由 Arjan van de Ven 提交于
As suggested by Dave: This patch adds a function to get the driver name from a struct net_device, and consequently uses this in the watchdog timeout handler to print as part of the message. Signed-off-by: NArjan van de Ven <arjan@linux.intel.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
This reverts commit a0c80b80. After discussions with Jamal and Herbert on netdev, we should provide at least minimal prioritization at the qdisc level even in multiqueue situations. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Daniel Lezcano 提交于
Removed unused variable 'skb' in the dev_deactivate_queue function Signed-off-by: NDaniel Lezcano <dlezcano@fr.ibm.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 21 7月, 2008 1 次提交
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由 David S. Miller 提交于
The stab bits can't be referenced uniless the full packet scheduler layer is enabled. Reported by Stephen Rothwell. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 20 7月, 2008 1 次提交
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由 Jussi Kivilinna 提交于
Add size table functions for qdiscs and calculate packet size in qdisc_enqueue(). Based on patch by Patrick McHardy http://marc.info/?l=linux-netdev&m=115201979221729&w=2Signed-off-by: NJussi Kivilinna <jussi.kivilinna@mbnet.fi> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 19 7月, 2008 2 次提交
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由 David S. Miller 提交于
Like noop_qdisc, it needs a dummy backpointer and explicit qdisc->q.lock initialization. Based upon a report by Stephen Hemminger. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
Idea is from Patrick McHardy. Instead of managing the list of qdiscs on the device level, manage it in the root qdisc of a netdev_queue. This solves all kinds of visibility issues during qdisc destruction. The way to iterate over all qdiscs of a netdev_queue is to visit the netdev_queue->qdisc, and then traverse it's list. The only special case is to ignore builting qdiscs at the root when dumping or doing a qdisc_lookup(). That was not needed previously because builtin qdiscs were not added to the device's qdisc_list. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 18 7月, 2008 13 次提交
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由 David S. Miller 提交于
Instead of 'pfifo_fast' we have just plain 'fifo_fast'. No priority queues, just a straight FIFO. This is necessary in order to legally have a seperate qdisc per queue in multi-TX-queue setups, and thus get full parallelization. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
We can simply use the qdisc->q.lock for all of the qdisc tree synchronization. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
No longer used. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
And give it it's own lock. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
This eliminates another qdisc_lock_tree user. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
This allows less strict control of access to the qdisc attached to a netdev_queue. It is even allowed to enqueue into a qdisc which is in the process of being destroyed. The RCU handler will toss out those packets. We will need this to handle sharing of a qdisc amongst multiple TX queues. In such a setup the lock has to be shared, so will be inside of the qdisc itself. At which point the netdev_queue lock cannot be used to hard synchronize access to the ->qdisc pointer. One operation we have to keep inside of qdisc_destroy() is the list deletion. It is the only piece of state visible after the RCU quiesce period, so we have to undo it early and under the appropriate locking. The operations in the RCU handler do not need any looking because the qdisc tree is no longer visible to anything at that point. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
We are registering the device, there is no way anyone can get at this object's qdiscs yet in any meaningful way. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
When we have shared qdiscs, packets come out of the qdiscs for multiple transmit queues. Therefore it doesn't make any sense to schedule the transmit queue when logically we cannot know ahead of time the TX queue of the SKB that the qdisc->dequeue() will give us. Just for sanity I added a BUG check to make sure we never get into a state where the noop_qdisc is scheduled. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
When code wants to lock the qdisc tree state, the logic operation it's doing is locking the top-level qdisc that sits of the root of the netdev_queue. Add qdisc_root_lock() to represent this and convert the easiest cases. In order for this to work out in all cases, we have to hook up the noop_qdisc to a dummy netdev_queue. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
Currently it is associated with a netdev_queue, but when we have qdisc sharing that no longer makes any sense. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
We liberate any dangling gso_skb during qdisc destruction. It really only matters for the root qdisc. But when qdiscs can be shared by multiple netdev_queue objects, we can't have the gso_skb in the netdev_queue any more. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
This effectively "flips the switch" by making the core networking and multiqueue-aware drivers use the new TX multiqueue structures. Non-multiqueue drivers need no changes. The interfaces they use such as netif_stop_queue() degenerate into an operation on TX queue zero. So everything "just works" for them. Code that really wants to do "X" to all TX queues now invokes a routine that does so, such as netif_tx_wake_all_queues(), netif_tx_stop_all_queues(), etc. pktgen and netpoll required a little bit more surgery than the others. In particular the pktgen changes, whilst functional, could be largely improved. The initial check in pktgen_xmit() will sometimes check the wrong queue, which is mostly harmless. The thing to do is probably to invoke fill_packet() earlier. The bulk of the netpoll changes is to make the code operate solely on the TX queue indicated by by the SKB queue mapping. Setting of the SKB queue mapping is entirely confined inside of net/core/dev.c:dev_pick_tx(). If we end up needing any kind of special semantics (drops, for example) it will be implemented here. Finally, we now have a "real_num_tx_queues" which is where the driver indicates how many TX queues are actually active. With IGB changes from Jeff Kirsher. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
alloc_netdev_mq() now allocates an array of netdev_queue structures for TX, based upon the queue_count argument. Furthermore, all accesses to the TX queues are now vectored through the netdev_get_tx_queue() and netdev_for_each_tx_queue() interfaces. This makes it easy to grep the tree for all things that want to get to a TX queue of a net device. Problem spots which are not really multiqueue aware yet, and only work with one queue, can easily be spotted by grepping for all netdev_get_tx_queue() calls that pass in a zero index. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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