From 74d00a8c3849c1340efd713eb94b786e304c201f Mon Sep 17 00:00:00 2001 From: John Crispin Date: Sun, 25 Dec 2016 20:11:34 +0100 Subject: kernel: split patches folder up into backport, pending and hack folders * properly format/comment all patches * merge debloat patches * merge Kconfig patches * merge swconfig patches * merge hotplug patches * drop 200-fix_localversion.patch - upstream * drop 222-arm_zimage_none.patch - unused * drop 252-mv_cesa_depends.patch - no longer required * drop 410-mtd-move-forward-declaration-of-struct-mtd_info.patch - unused * drop 661-fq_codel_keep_dropped_stats.patch - outdated * drop 702-phy_add_aneg_done_function.patch - upstream * drop 840-rtc7301.patch - unused * drop 841-rtc_pt7c4338.patch - upstream * drop 921-use_preinit_as_init.patch - unused * drop spio-gpio-old and gpio-mmc - unused Signed-off-by: John Crispin --- ...-fq_codel-add-memory-limitation-per-queue.patch | 182 --------------------- 1 file changed, 182 deletions(-) delete mode 100644 target/linux/generic/patches-4.4/033-fq_codel-add-memory-limitation-per-queue.patch (limited to 'target/linux/generic/patches-4.4/033-fq_codel-add-memory-limitation-per-queue.patch') diff --git a/target/linux/generic/patches-4.4/033-fq_codel-add-memory-limitation-per-queue.patch b/target/linux/generic/patches-4.4/033-fq_codel-add-memory-limitation-per-queue.patch deleted file mode 100644 index 455add9eae..0000000000 --- a/target/linux/generic/patches-4.4/033-fq_codel-add-memory-limitation-per-queue.patch +++ /dev/null @@ -1,182 +0,0 @@ -From: Eric Dumazet -Date: Fri, 6 May 2016 08:55:12 -0700 -Subject: [PATCH] fq_codel: add memory limitation per queue -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -On small embedded routers, one wants to control maximal amount of -memory used by fq_codel, instead of controlling number of packets or -bytes, since GRO/TSO make these not practical. - -Assuming skb->truesize is accurate, we have to keep track of -skb->truesize sum for skbs in queue. - -This patch adds a new TCA_FQ_CODEL_MEMORY_LIMIT attribute. - -I chose a default value of 32 MBytes, which looks reasonable even -for heavy duty usages. (Prior fq_codel users should not be hurt -when they upgrade their kernels) - -Two fields are added to tc_fq_codel_qd_stats to report : - - Current memory usage - - Number of drops caused by memory limits - -# tc qd replace dev eth1 root est 1sec 4sec fq_codel memory_limit 4M -.. -# tc -s -d qd sh dev eth1 -qdisc fq_codel 8008: root refcnt 257 limit 10240p flows 1024 - quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn - Sent 2083566791363 bytes 1376214889 pkt (dropped 4994406, overlimits 0 -requeues 21705223) - rate 9841Mbit 812549pps backlog 3906120b 376p requeues 21705223 - maxpacket 68130 drop_overlimit 4994406 new_flow_count 28855414 - ecn_mark 0 memory_used 4190048 drop_overmemory 4994406 - new_flows_len 1 old_flows_len 177 - -Signed-off-by: Eric Dumazet -Cc: Jesper Dangaard Brouer -Cc: Dave Täht -Cc: Sebastian Möller -Signed-off-by: David S. Miller ---- - ---- a/include/uapi/linux/pkt_sched.h -+++ b/include/uapi/linux/pkt_sched.h -@@ -712,6 +712,7 @@ enum { - TCA_FQ_CODEL_QUANTUM, - TCA_FQ_CODEL_CE_THRESHOLD, - TCA_FQ_CODEL_DROP_BATCH_SIZE, -+ TCA_FQ_CODEL_MEMORY_LIMIT, - __TCA_FQ_CODEL_MAX - }; - -@@ -736,6 +737,8 @@ struct tc_fq_codel_qd_stats { - __u32 new_flows_len; /* count of flows in new list */ - __u32 old_flows_len; /* count of flows in old list */ - __u32 ce_mark; /* packets above ce_threshold */ -+ __u32 memory_usage; /* in bytes */ -+ __u32 drop_overmemory; - }; - - struct tc_fq_codel_cl_stats { ---- a/net/sched/sch_fq_codel.c -+++ b/net/sched/sch_fq_codel.c -@@ -58,8 +58,11 @@ struct fq_codel_sched_data { - u32 perturbation; /* hash perturbation */ - u32 quantum; /* psched_mtu(qdisc_dev(sch)); */ - u32 drop_batch_size; -+ u32 memory_limit; - struct codel_params cparams; - struct codel_stats cstats; -+ u32 memory_usage; -+ u32 drop_overmemory; - u32 drop_overlimit; - u32 new_flow_count; - -@@ -141,6 +144,7 @@ static unsigned int fq_codel_drop(struct - unsigned int maxbacklog = 0, idx = 0, i, len; - struct fq_codel_flow *flow; - unsigned int threshold; -+ unsigned int mem = 0; - - /* Queue is full! Find the fat flow and drop packet(s) from it. - * This might sound expensive, but with 1024 flows, we scan -@@ -165,11 +169,13 @@ static unsigned int fq_codel_drop(struct - do { - skb = dequeue_head(flow); - len += qdisc_pkt_len(skb); -+ mem += skb->truesize; - kfree_skb(skb); - } while (++i < max_packets && len < threshold); - - flow->dropped += i; - q->backlogs[idx] -= len; -+ q->memory_usage -= mem; - sch->qstats.drops += i; - sch->qstats.backlog -= len; - sch->q.qlen -= i; -@@ -191,6 +197,7 @@ static int fq_codel_enqueue(struct sk_bu - unsigned int idx, prev_backlog, prev_qlen; - struct fq_codel_flow *flow; - int uninitialized_var(ret); -+ bool memory_limited; - - idx = fq_codel_classify(skb, sch, &ret); - if (idx == 0) { -@@ -213,7 +220,9 @@ static int fq_codel_enqueue(struct sk_bu - flow->deficit = q->quantum; - flow->dropped = 0; - } -- if (++sch->q.qlen <= sch->limit) -+ q->memory_usage += skb->truesize; -+ memory_limited = q->memory_usage > q->memory_limit; -+ if (++sch->q.qlen <= sch->limit && !memory_limited) - return NET_XMIT_SUCCESS; - - prev_backlog = sch->qstats.backlog; -@@ -227,7 +236,8 @@ static int fq_codel_enqueue(struct sk_bu - ret = fq_codel_drop(sch, q->drop_batch_size); - - q->drop_overlimit += prev_qlen - sch->q.qlen; -- -+ if (memory_limited) -+ q->drop_overmemory += prev_qlen - sch->q.qlen; - /* As we dropped packet(s), better let upper stack know this */ - qdisc_tree_reduce_backlog(sch, prev_qlen - sch->q.qlen, - prev_backlog - sch->qstats.backlog); -@@ -296,6 +306,7 @@ begin: - list_del_init(&flow->flowchain); - goto begin; - } -+ q->memory_usage -= skb->truesize; - qdisc_bstats_update(sch, skb); - flow->deficit -= qdisc_pkt_len(skb); - /* We cant call qdisc_tree_reduce_backlog() if our qlen is 0, -@@ -343,6 +354,7 @@ static const struct nla_policy fq_codel_ - [TCA_FQ_CODEL_QUANTUM] = { .type = NLA_U32 }, - [TCA_FQ_CODEL_CE_THRESHOLD] = { .type = NLA_U32 }, - [TCA_FQ_CODEL_DROP_BATCH_SIZE] = { .type = NLA_U32 }, -+ [TCA_FQ_CODEL_MEMORY_LIMIT] = { .type = NLA_U32 }, - }; - - static int fq_codel_change(struct Qdisc *sch, struct nlattr *opt) -@@ -397,7 +409,11 @@ static int fq_codel_change(struct Qdisc - if (tb[TCA_FQ_CODEL_DROP_BATCH_SIZE]) - q->drop_batch_size = min(1U, nla_get_u32(tb[TCA_FQ_CODEL_DROP_BATCH_SIZE])); - -- while (sch->q.qlen > sch->limit) { -+ if (tb[TCA_FQ_CODEL_MEMORY_LIMIT]) -+ q->memory_limit = min(1U << 31, nla_get_u32(tb[TCA_FQ_CODEL_MEMORY_LIMIT])); -+ -+ while (sch->q.qlen > sch->limit || -+ q->memory_usage > q->memory_limit) { - struct sk_buff *skb = fq_codel_dequeue(sch); - - q->cstats.drop_len += qdisc_pkt_len(skb); -@@ -442,6 +458,7 @@ static int fq_codel_init(struct Qdisc *s - - sch->limit = 10*1024; - q->flows_cnt = 1024; -+ q->memory_limit = 32 << 20; /* 32 MBytes */ - q->drop_batch_size = 64; - q->quantum = psched_mtu(qdisc_dev(sch)); - q->perturbation = prandom_u32(); -@@ -502,6 +519,8 @@ static int fq_codel_dump(struct Qdisc *s - q->quantum) || - nla_put_u32(skb, TCA_FQ_CODEL_DROP_BATCH_SIZE, - q->drop_batch_size) || -+ nla_put_u32(skb, TCA_FQ_CODEL_MEMORY_LIMIT, -+ q->memory_limit) || - nla_put_u32(skb, TCA_FQ_CODEL_FLOWS, - q->flows_cnt)) - goto nla_put_failure; -@@ -530,6 +549,8 @@ static int fq_codel_dump_stats(struct Qd - st.qdisc_stats.ecn_mark = q->cstats.ecn_mark; - st.qdisc_stats.new_flow_count = q->new_flow_count; - st.qdisc_stats.ce_mark = q->cstats.ce_mark; -+ st.qdisc_stats.memory_usage = q->memory_usage; -+ st.qdisc_stats.drop_overmemory = q->drop_overmemory; - - list_for_each(pos, &q->new_flows) - st.qdisc_stats.new_flows_len++; -- cgit v1.2.3