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path: root/net/sched/sch_gred.c
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2005-11-05[PKT_SCHED]: (G)RED: Introduce hard droppingThomas Graf1-1/+7
Introduces a new flag TC_RED_HARDDROP which specifies that if ECN marking is enabled packets should still be dropped once the average queue length exceeds the maximum threshold. This _may_ help to avoid global synchronisation during small bursts of peers advertising but not caring about ECN. Use this option very carefully, it does more harm than good if (qth_max - qth_min) does not cover at least two average burst cycles. The difference to the current behaviour, in which we'd run into the hard queue limit, is that due to the low pass filter of RED short bursts are less likely to cause a global synchronisation. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2005-11-05[PKT_SCHED]: GRED: Support ECN markingThomas Graf1-4/+21
Adds a new u8 flags in a unused padding area of the netlink message. Adds ECN marking support to be used instead of dropping packets immediately. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2005-11-05[PKT_SCHED]: GRED: Fix restart of idle period in WRED mode upon dequeue and dropThomas Graf1-2/+2
Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2005-11-05[PKT_SCHED]: GRED: Cleanup and remove unnecessary codeThomas Graf1-69/+31
Removes unnecessary includes, initializers, and simplifies the code a bit. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2005-11-05[PKT_SCHED]: GRED: Remove auto-creation of default VQThomas Graf1-9/+0
Since we are no longer depending on the default VQ to be always allocated we can leave it up to the user to actually create it. This gives the user the ability to leave it out on purpose and enqueue packets directly to the device without applying the RED algorithm. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2005-11-05[PKT_SCHED]: GRED: Dont abuse default VQ for equalizingThomas Graf1-17/+20
Introduces a new red parameter set for use in equalize mode, although only the qavg variable and the idle period marker are being used for now this makes it possible to allow a separate parameter set to be used for equalize later on. The use of this separate parameter set fixes a bogus start of an idle period in gred_drop() which did start an idle period on the default VQ even if equalize mode was disabled. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2005-11-05[PKT_SCHED]: GRED: Remove initd flagThomas Graf1-14/+1
The case when the default VQ is not set up yet is already handled in a less error prone way. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2005-11-05[PKT_SCHED]: GRED: Improve error handling and messagesThomas Graf1-24/+44
Try to enqueue packets if we cannot associate it with a VQ, this basically means that the default VQ has not been set up yet. We must check if the VQ still exists while requeueing, the VQ might have been changed between dequeue and the requeue of the underlying qdisc. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2005-11-05[PKT_SCHED]: GRED: Introduce tc_index_to_dp()Thomas Graf1-9/+18
Adds a transformation function returning the DP index for a given skb according to its tc_index. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2005-11-05[PKT_SCHED]: GRED: Use generic queue management interfaceThomas Graf1-23/+9
Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2005-11-05[PKT_SCHED]: GRED: Report congestion related drops as NET_XMIT_CNThomas Graf1-2/+7
Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2005-11-05[PKT_SCHED]: GRED: Do not reset statistics in gred_reset/gred_changeThomas Graf1-9/+0
Qdiscs are not supposed to reset statistics in reset() and while changing parameters. My argumentation is that if the user wants the counters to be reset he can simply remove and readd the qdiscs, that's what most users do anyway. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2005-11-05[PKT_SCHED]: GRED: Use new generic red interfaceThomas Graf1-133/+91
Simplifies code a lot by separating the red algorithm and the queueing logic. We now differentiate between probability marks and forced marks but sum them together again to not break backwards compatibility. This brings GRED back to the level of RED and improves the accuracy of the averge queue length calculations when stab suggests a zero shift. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2005-11-05[PKT_SCHED]: GRED: Use central VQ change procedureThomas Graf1-89/+84
Introduces a function gred_change_vq() acting as a central point to change VQ parameters. Fixes priority inheritance in rio mode when the default DP equals 0. Adds proper locking during changes. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2005-11-05[PKT_SCHED]: GRED: Report out-of-bound DPs as illegalThomas Graf1-6/+3
Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2005-11-05[PKT_SCHED]: GRED: Use a central table definition change procedureThomas Graf1-52/+61
Introduces a function gred_change_table_def() acting as a central point to change the table definition. Adds missing validations for table definition: MAX_DPs > DPs > 0 and def_DP < DPs thus fixing possible invalid memory reference oopses. Only root could do it but having a typo crashing the machine is a bit hard. Adds missing locking while changing the table definition, the operation of changing the number of DPs and removing shadowed VQs may not be interrupted by a dequeue. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2005-11-05[PKT_SCHED]: GRED: Dump table definitionThomas Graf1-0/+6
Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2005-11-05[PKT_SCHED]: GRED: Cleanup dumpingThomas Graf1-58/+34
Avoids the allocation of a buffer by appending the VQs directly to the skb and simplifies the code by using the appropriate message construction macros. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2005-11-05[PKT_SCHED]: GRED: Transform grio to GRED_RIO_MODEThomas Graf1-8/+28
Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2005-11-05[PKT_SCHED]: GRED: Cleanup equalize flag and add new WRED mode detectionThomas Graf1-22/+65
Introduces a flags variable using bitops and transforms eqp to use it. Converts the conditions of the form (wred && rio) to (wred) since wred can only be enabled in rio mode anyway. The patch also improves WRED mode detection. The current behaviour does not allow WRED mode to be turned off again without removing the whole qdisc first. The new algorithm checks each VQ against each other looking for equal priorities every time a VQ is changed or added. The performance is poor, O(n**2), but it's used only during administrative tasks and the number of VQs is strictly limited. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2005-04-16Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds1-0/+630
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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