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450b306e54
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>
(cherry picked from commit 1ac627024d)
101 lines
2.3 KiB
Diff
101 lines
2.3 KiB
Diff
--- a/ath10k-4.19/pci.c
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+++ b/ath10k-4.19/pci.c
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@@ -142,7 +142,11 @@ static struct ce_attr host_ce_config_wla
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.flags = CE_ATTR_FLAGS,
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.src_nentries = 0,
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.src_sz_max = 2048,
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+#ifndef CONFIG_ATH10K_SMALLBUFFERS
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.dest_nentries = 512,
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+#else
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+ .dest_nentries = 128,
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+#endif
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.recv_cb = ath10k_pci_htt_htc_rx_cb,
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},
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@@ -151,7 +155,11 @@ static struct ce_attr host_ce_config_wla
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.flags = CE_ATTR_FLAGS,
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.src_nentries = 0,
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.src_sz_max = 2048,
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+#ifndef CONFIG_ATH10K_SMALLBUFFERS
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.dest_nentries = 128,
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+#else
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+ .dest_nentries = 64,
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+#endif
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.recv_cb = ath10k_pci_htc_rx_cb,
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},
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@@ -178,7 +186,11 @@ static struct ce_attr host_ce_config_wla
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.flags = CE_ATTR_FLAGS,
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.src_nentries = 0,
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.src_sz_max = 512,
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+#ifndef CONFIG_ATH10K_SMALLBUFFERS
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.dest_nentries = 512,
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+#else
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+ .dest_nentries = 128,
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+#endif
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.recv_cb = ath10k_pci_htt_rx_cb,
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},
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@@ -203,7 +215,11 @@ static struct ce_attr host_ce_config_wla
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.flags = CE_ATTR_FLAGS,
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.src_nentries = 0,
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.src_sz_max = 2048,
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+#ifndef CONFIG_ATH10K_SMALLBUFFERS
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.dest_nentries = 128,
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+#else
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+ .dest_nentries = 96,
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+#endif
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.recv_cb = ath10k_pci_pktlog_rx_cb,
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},
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--- a/ath10k-5.2/pci.c
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+++ b/ath10k-5.2/pci.c
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@@ -131,7 +131,11 @@ static struct ce_attr host_ce_config_wla
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.flags = CE_ATTR_FLAGS,
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.src_nentries = 0,
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.src_sz_max = 2048,
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+#ifndef CONFIG_ATH10K_SMALLBUFFERS
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.dest_nentries = 512,
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+#else
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+ .dest_nentries = 128,
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+#endif
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.recv_cb = ath10k_pci_htt_htc_rx_cb,
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},
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@@ -140,7 +144,11 @@ static struct ce_attr host_ce_config_wla
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.flags = CE_ATTR_FLAGS,
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.src_nentries = 0,
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.src_sz_max = 2048,
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+#ifndef CONFIG_ATH10K_SMALLBUFFERS
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.dest_nentries = 128,
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+#else
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+ .dest_nentries = 64,
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+#endif
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.recv_cb = ath10k_pci_htc_rx_cb,
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},
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@@ -167,7 +175,11 @@ static struct ce_attr host_ce_config_wla
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.flags = CE_ATTR_FLAGS,
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.src_nentries = 0,
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.src_sz_max = 512,
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+#ifndef CONFIG_ATH10K_SMALLBUFFERS
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.dest_nentries = 512,
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+#else
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+ .dest_nentries = 128,
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+#endif
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.recv_cb = ath10k_pci_htt_rx_cb,
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},
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@@ -192,7 +204,11 @@ static struct ce_attr host_ce_config_wla
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.flags = CE_ATTR_FLAGS,
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.src_nentries = 0,
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.src_sz_max = 2048,
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+#ifndef CONFIG_ATH10K_SMALLBUFFERS
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.dest_nentries = 128,
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+#else
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+ .dest_nentries = 96,
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+#endif
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.recv_cb = ath10k_pci_pktlog_rx_cb,
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},
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