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Bluetooth: host: add dedicated WQ for long-running tasks

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Send long-running tasks to a dedicated low-priority workqueue.

This shouldn't increase memory usage since by doing this, we get rid of the
ECC processing thread.

This should fix issues like #43811, since the system workqueue runs at a
cooperative priority, and the new dedicated one runs at a pre-emptible
priority.

Fixes #43811

Signed-off-by: Jonathan Rico <jonathan.rico@nordicsemi.no>
This commit is contained in:
Jonathan Rico 2022-05-30 16:08:11 +02:00 • committed by Carles Cufí
commit 3c5bf5089a
9 changed files with 106 additions and 48 deletions
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subsys/bluetooth/host/CMakeLists.txt
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@ -12,6 +12,7 @@ zephyr_library_sources_ifdef(CONFIG_BT_RFCOMM rfcomm.c)
zephyr_library_sources_ifdef(CONFIG_BT_TESTING testing.c)
zephyr_library_sources_ifdef(CONFIG_BT_SETTINGS settings.c)
zephyr_library_sources_ifdef(CONFIG_BT_HOST_CCM aes_ccm.c)
zephyr_library_sources_ifdef(CONFIG_BT_LONG_WQ long_wq.c)
zephyr_library_sources_ifdef(
CONFIG_BT_BREDR