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debug: add some test patches to reduce or analyze memory usage

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Matthias Schiffer 2017-11-27 16:43:05 +01:00 committed by Linus Lüssing
parent 01336f70ec
commit 1b14f729cc
4 changed files with 81 additions and 0 deletions
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19
patches/lede/0066-generic-disable-CONFIG_PROC_STRIPPED.patch Normal file
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@ -0,0 +1,19 @@
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Mon, 27 Nov 2017 16:14:28 +0100
Subject: generic: disable CONFIG_PROC_STRIPPED
We want /proc/vmallocstat.
diff --git a/target/linux/generic/config-4.4 b/target/linux/generic/config-4.4
index 4711fd7f5bff377a515b34629a5706839666884f..9c6ef6631efd91cd2ef5546d4855242b9b79f185 100644
--- a/target/linux/generic/config-4.4
+++ b/target/linux/generic/config-4.4
@@ -3036,7 +3036,7 @@ CONFIG_PRINT_STACK_DEPTH=64
CONFIG_PROC_FS=y
# CONFIG_PROC_KCORE is not set
# CONFIG_PROC_PAGE_MONITOR is not set
-CONFIG_PROC_STRIPPED=y
+# CONFIG_PROC_STRIPPED is not set
CONFIG_PROC_SYSCTL=y
# CONFIG_PROFILE_ALL_BRANCHES is not set
# CONFIG_PROFILE_ANNOTATED_BRANCHES is not set

17
patches/lede/0067-generic-reduce-fq_codel-per-queue-memory-limit-to-1MB.patch Normal file
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@ -0,0 +1,17 @@
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Mon, 27 Nov 2017 16:15:20 +0100
Subject: generic: reduce fq_codel per-queue memory limit to 1MB
diff --git a/target/linux/generic/patches-4.4/660-fq_codel_defaults.patch b/target/linux/generic/patches-4.4/660-fq_codel_defaults.patch
index 46fceffcf174f4b37a9a0aac9eba1d1e0505ef24..4e65f3afc2cf850991a03830110eb8440bb78c2d 100644
--- a/target/linux/generic/patches-4.4/660-fq_codel_defaults.patch
+++ b/target/linux/generic/patches-4.4/660-fq_codel_defaults.patch
@@ -5,7 +5,7 @@
sch->limit = 10*1024;
q->flows_cnt = 1024;
- q->memory_limit = 32 << 20; /* 32 MBytes */
-+ q->memory_limit = 4 << 20; /* 4 MBytes */
++ q->memory_limit = 1 << 20; /* 1 MBytes */
q->drop_batch_size = 64;
q->quantum = psched_mtu(qdisc_dev(sch));
q->perturbation = prandom_u32();

43
patches/lede/0068-mac80211-fq_impl-Properly-enforce-memory-limit.patch Normal file
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@ -0,0 +1,43 @@
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Mon, 27 Nov 2017 16:39:51 +0100
Subject: mac80211: fq_impl: Properly enforce memory limit
diff --git a/package/kernel/mac80211/patches/095-fq_impl-Properly-enforce-memory-limit.patch b/package/kernel/mac80211/patches/095-fq_impl-Properly-enforce-memory-limit.patch
new file mode 100644
index 0000000000000000000000000000000000000000..83b5c259195a121909dae70992d199987c8b262c
--- /dev/null
+++ b/package/kernel/mac80211/patches/095-fq_impl-Properly-enforce-memory-limit.patch
@@ -0,0 +1,33 @@
+--- a/include/net/fq_impl.h
++++ b/include/net/fq_impl.h
+@@ -146,6 +146,7 @@ static void fq_tin_enqueue(struct fq *fq
+ fq_flow_get_default_t get_default_func)
+ {
+ struct fq_flow *flow;
++ bool oom;
+
+ lockdep_assert_held(&fq->lock);
+
+@@ -167,8 +168,8 @@ static void fq_tin_enqueue(struct fq *fq
+ }
+
+ __skb_queue_tail(&flow->queue, skb);
+-
+- if (fq->backlog > fq->limit || fq->memory_usage > fq->memory_limit) {
++ oom = (fq->memory_usage > fq->memory_limit);
++ while (fq->backlog > fq->limit || oom) {
+ flow = list_first_entry_or_null(&fq->backlogs,
+ struct fq_flow,
+ backlogchain);
+@@ -183,8 +184,10 @@ static void fq_tin_enqueue(struct fq *fq
+
+ flow->tin->overlimit++;
+ fq->overlimit++;
+- if (fq->memory_usage > fq->memory_limit)
++ if (oom) {
+ fq->overmemory++;
++ oom = (fq->memory_usage > fq->memory_limit);
++ }
+ }
+ }
+

2
targets/generic
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@ -21,6 +21,8 @@ config '# CONFIG_BUSYBOX_CONFIG_FEATURE_PREFER_IPV4_ADDRESS is not set'
config 'CONFIG_PACKAGE_ATH_DEBUG=y'
config 'CONFIG_KERNEL_SLABINFO=y'
try_config 'CONFIG_TARGET_MULTI_PROFILE=y'
try_config 'CONFIG_TARGET_PER_DEVICE_ROOTFS=y'