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io_uring: add GCOV_PROFILE_URING Kconfig option

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If GCOV is enabled and this option is set, it enables code coverage
profiling of the io_uring subsystem. Only use this for test purposes,
as it will impact the runtime performance.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2024-08-30 10:52:02 -06:00
parent ae98dbf43d
commit 1802656ef8
2 changed files with 17 additions and 0 deletions
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13
init/Kconfig
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@ -1687,6 +1687,19 @@ config IO_URING
applications to submit and complete IO through submission and
completion rings that are shared between the kernel and application.
config GCOV_PROFILE_URING
bool "Enable GCOV profiling on the io_uring subsystem"
depends on GCOV_KERNEL
help
Enable GCOV profiling on the io_uring subsystem, to facilitate
code coverage testing.
If unsure, say N.
Note that this will have a negative impact on the performance of
the io_uring subsystem, hence this should only be enabled for
specific test purposes.
config ADVISE_SYSCALLS
bool "Enable madvise/fadvise syscalls" if EXPERT
default y

4
io_uring/Makefile
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@ -2,6 +2,10 @@
#
# Makefile for io_uring
ifdef CONFIG_GCOV_PROFILE_URING
GCOV_PROFILE := y
endif
obj-$(CONFIG_IO_URING) += io_uring.o opdef.o kbuf.o rsrc.o notif.o \
tctx.o filetable.o rw.o net.o poll.o \
eventfd.o uring_cmd.o openclose.o \