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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 applications to submit and complete IO through submission and
completion rings that are shared between the kernel and application. 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 config ADVISE_SYSCALLS
bool "Enable madvise/fadvise syscalls" if EXPERT bool "Enable madvise/fadvise syscalls" if EXPERT
default y default y

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