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Bluetooth: host: Add config option for discardable buffer size.

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Add option to set the size of the discardable buffer pool. This saves
memory for the MESH use case where we expect a large number of advertise
reports.

Signed-off-by: Joakim Andersson <joakim.andersson@nordicsemi.no>
This commit is contained in:
Joakim Andersson 2020-01-10 09:30:34 +01:00 • committed by Carles Cufí
commit afa9c42d75
2 changed files with 12 additions and 1 deletions
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10
subsys/bluetooth/host/Kconfig
View file

@ -60,6 +60,16 @@ config BT_DISCARDABLE_BUF_COUNT
it will not cause the allocation for other critical events to
block and may even eliminate deadlocks in some cases.
config BT_DISCARDABLE_BUF_SIZE
int "Size of discardable event buffers"
range 44 257
default 257 if BT_BREDR
default 44
help
Size of buffers in the separate discardable event buffer pool.
The minimum size is set based on the Advertising Report. Setting
the buffer size different than BT_RX_BUF_LEN can save memory.
config BT_HCI_TX_STACK_SIZE
# NOTE: This value is derived from other symbols and should only be
# changed if required by architecture

3
subsys/bluetooth/host/hci_core.c
View file

@ -168,8 +168,9 @@ NET_BUF_POOL_FIXED_DEFINE(num_complete_pool, 1, BT_BUF_RX_SIZE, NULL);
#endif /* CONFIG_BT_CONN */
#if defined(CONFIG_BT_DISCARDABLE_BUF_COUNT)
#define DISCARDABLE_EVENT_SIZE BT_BUF_SIZE(CONFIG_BT_DISCARDABLE_BUF_SIZE)
NET_BUF_POOL_FIXED_DEFINE(discardable_pool, CONFIG_BT_DISCARDABLE_BUF_COUNT,
BT_BUF_RX_SIZE, NULL);
DISCARDABLE_EVENT_SIZE, NULL);
#endif /* CONFIG_BT_DISCARDABLE_BUF_COUNT */
struct event_handler {