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452f94cecf
linux/arch/um/kernel
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Johannes Berg 452f94cecf um: time-travel: Actually apply "free-until" optimisation 
Due a bug - we never checked the time_travel_ext_free_until value - we
were always requesting time for every single scheduling. This adds up
since we make reading time cost 256ns, and it's a fairly common call.
Fix this.

While at it, also make reading time only cost something when we're not
currently waiting for our scheduling turn - otherwise things get mixed
up in a very confusing way. We should never get here, since we're not
actually running, but it's possible if you stick printk() or such into
the virtio code that must handle the external interrupts.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2020-12-13 22:41:56 +01:00
..
skas arch/um: partially revert the conversion to __section() macro 2020-10-26 15:39:37 -07:00
asm-offsets.c
config.c.in um: Add SPDX headers to files in arch/um/kernel/ 2019-09-15 21:37:17 +02:00
dyn.lds.S vmlinux.lds.h: Split ELF_DETAILS from STABS_DEBUG 2020-09-01 09:50:35 +02:00
early_printk.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
exec.c um: Add SPDX headers to files in arch/um/kernel/ 2019-09-15 21:37:17 +02:00
exitcode.c proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
gmon_syms.c um: Add SPDX headers to files in arch/um/kernel/ 2019-09-15 21:37:17 +02:00
gprof_syms.c um: Add SPDX headers to files in arch/um/kernel/ 2019-09-15 21:37:17 +02:00
initrd.c um: Add SPDX headers to files in arch/um/kernel/ 2019-09-15 21:37:17 +02:00
irq.c um: Support suspend to RAM 2020-12-13 22:22:49 +01:00
kmsg_dump.c um: Don't use console_drivers directly 2020-03-29 23:17:10 +02:00
ksyms.c um: Add SPDX headers to files in arch/um/kernel/ 2019-09-15 21:37:17 +02:00
maccess.c maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault 2020-06-17 10:57:41 -07:00
Makefile um: Add SPDX headers to files in arch/um/kernel/ 2019-09-15 21:37:17 +02:00
mem.c asm-generic: pgalloc: provide generic pgd_free() 2020-08-07 11:33:26 -07:00
physmem.c um: Add SPDX headers to files in arch/um/kernel/ 2019-09-15 21:37:17 +02:00
process.c um: allocate a guard page to helper threads 2020-12-13 22:38:06 +01:00
ptrace.c um: Add SPDX headers to files in arch/um/kernel/ 2019-09-15 21:37:17 +02:00
reboot.c um: Add SPDX headers to files in arch/um/kernel/ 2019-09-15 21:37:17 +02:00
sigio.c um: Support dynamic IRQ allocation 2020-12-13 22:22:08 +01:00
signal.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
stacktrace.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
syscall.c um: Add SPDX headers to files in arch/um/kernel/ 2019-09-15 21:37:17 +02:00
sysrq.c um: Clean up stacktrace dump 2020-10-11 23:25:07 +02:00
time.c um: time-travel: Actually apply "free-until" optimisation 2020-12-13 22:41:56 +01:00
tlb.c um: support some of ARCH_HAS_SET_MEMORY 2020-12-13 22:38:06 +01:00
trap.c mm: clean up the last pieces of page fault accountings 2020-08-12 10:58:04 -07:00
um_arch.c um: Support suspend to RAM 2020-12-13 22:22:49 +01:00
umid.c um: Add SPDX headers to files in arch/um/kernel/ 2019-09-15 21:37:17 +02:00
uml.lds.S vmlinux.lds.h: Split ELF_DETAILS from STABS_DEBUG 2020-09-01 09:50:35 +02:00
vmlinux.lds.S