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| author | Paul Fertser <fercerpav@gmail.com> | 2019-12-22 21:20:57 +0300 |
|---|---|---|
| committer | Hauke Mehrtens <hauke@hauke-m.de> | 2019-12-24 00:56:51 +0100 |
| commit | 1ac627024de916eb157659caf49f93fa89d3b19a (patch) | |
| tree | c6804526a1236399d745092307e775a4b6ff200f /package/kernel/ath10k-ct/Makefile | |
| parent | c715f71bcee8cd9ec949ebb9f8d173983755f216 (diff) | |
| download | upstream-1ac627024de916eb157659caf49f93fa89d3b19a.tar.gz upstream-1ac627024de916eb157659caf49f93fa89d3b19a.tar.bz2 upstream-1ac627024de916eb157659caf49f93fa89d3b19a.zip | |
kernel: ath10k-ct: provide a build variant for small RAM devices
According to many bugreports [0][1][2] the default ath10k-ct kernel
module is unusable on devices with just 64 MiB RAM or with 128 MiB and
dual ath10k cards. The target boards boot but eventually oom-killer
starts to interfere with normal operation, so the current state is
effectively broken.
Since the two patches in question have a performance impact (and
possibly some other unexpected side-effects) a dedicated build variant
is added so that users of the low RAM devices can still benefit from all
the ath10k-ct advantages.
According to testing [3] results, the issue can be experienced even with
"a 256MB device with three radios". Measured performance impact of
implementing small buffers was lowering "the maximum 5 GHz throughput on
an IPQ40xx device without RPS/XPS optimizations from 494/432 Mbit/s for
TCP transfers (download/upload) to 438/343 Mbit/s"
The patches were apparently inspired by QSDK tweaks used by ODMs for the
affected devices.
[0] http://lists.infradead.org/pipermail/openwrt-devel/2019-December/020573.html
[1] https://github.com/openwrt/openwrt/pull/1077
[2] https://bugs.openwrt.org/index.php?do=details&task_id=2664
[3] https://github.com/freifunk-gluon/gluon/pull/1440#issue-195607701
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
[Remove double CONFIG_ATH10K-CT_LEDS entry]
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Diffstat (limited to 'package/kernel/ath10k-ct/Makefile')
| -rw-r--r-- | package/kernel/ath10k-ct/Makefile | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/package/kernel/ath10k-ct/Makefile b/package/kernel/ath10k-ct/Makefile index dbf75fe174..c29d28f41a 100644 --- a/package/kernel/ath10k-ct/Makefile +++ b/package/kernel/ath10k-ct/Makefile @@ -35,6 +35,7 @@ define KernelPackage/ath10k-ct $(PKG_BUILD_DIR)/ath10k$(CT_KVER)/ath10k_core.ko AUTOLOAD:=$(call AutoProbe,ath10k_pci) PROVIDES:=kmod-ath10k + VARIANT:=regular endef define KernelPackage/ath10k-ct/config @@ -42,7 +43,13 @@ define KernelPackage/ath10k-ct/config config ATH10K-CT_LEDS bool "Enable LED support" default y - depends on PACKAGE_kmod-ath10k-ct + depends on PACKAGE_kmod-ath10k-ct || PACKAGE_kmod-ath10k-ct-smallbuffers +endef + +define KernelPackage/ath10k-ct-smallbuffers +$(call KernelPackage/ath10k-ct) + TITLE+= (small buffers for low-RAM devices) + VARIANT:=smallbuffers endef NOSTDINC_FLAGS = \ @@ -90,6 +97,10 @@ ifeq ($(CONFIG_ATH10K-CT_LEDS),y) NOSTDINC_FLAGS += -DCONFIG_ATH10K_LEDS endif +ifeq ($(BUILD_VARIANT),smallbuffers) + NOSTDINC_FLAGS += -DCONFIG_ATH10K_SMALLBUFFERS +endif + define Build/Configure cp $(STAGING_DIR)/usr/include/mac80211/ath/*.h $(PKG_BUILD_DIR) endef @@ -107,3 +118,4 @@ define Build/Compile endef $(eval $(call KernelPackage,ath10k-ct)) +$(eval $(call KernelPackage,ath10k-ct-smallbuffers)) |