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No functional change intended. Signed-off-by: Roger Pau Monn=C3=A9 --- xen/drivers/char/Kconfig | 10 ++++++++++ xen/drivers/char/serial.c | 3 ++- 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/xen/drivers/char/Kconfig b/xen/drivers/char/Kconfig index e5f7b1d8eb..a349d55f18 100644 --- a/xen/drivers/char/Kconfig +++ b/xen/drivers/char/Kconfig @@ -74,3 +74,13 @@ config HAS_EHCI help This selects the USB based EHCI debug port to be used as a UART. If you have an x86 based system with USB, say Y. + +config SERIAL_TX_BUFSIZE + int "Size of the transmit serial buffer" + default 16384 + help + Controls the default size of the transmit buffer (in bytes) used by + the serial driver. Note the value provided will be rounder up to + PAGE_SIZE. + + Default value is 16384 (16KB). diff --git a/xen/drivers/char/serial.c b/xen/drivers/char/serial.c index 5ecba0af33..8d375a41e3 100644 --- a/xen/drivers/char/serial.c +++ b/xen/drivers/char/serial.c @@ -16,7 +16,8 @@ /* Never drop characters, even if the async transmit buffer fills. */ /* #define SERIAL_NEVER_DROP_CHARS 1 */ =20 -unsigned int __read_mostly serial_txbufsz =3D 16384; +unsigned int __ro_after_init serial_txbufsz =3D ROUNDUP(CONFIG_SERIAL_TX_B= UFSIZE, + PAGE_SIZE); size_param("serial_tx_buffer", serial_txbufsz); =20 #define mask_serial_rxbuf_idx(_i) ((_i)&(serial_rxbufsz-1)) --=20 2.36.1