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uml: track and make up lost ticks

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Alarm delivery could be noticably late in the !CONFIG_NOHZ case because lost
ticks weren't being taken into account.  This is now treated more carefully,
with the time between ticks being calculated and the appropriate number of
ticks delivered to the timekeeping system.

Cc: Nix <nix@esperi.org.uk>
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jeff Dike
2008-05-12 14:02:00 -07:00
committed by Linus Torvalds
parent 3d88958e01
commit fe2cc53ee0
3 changed files with 53 additions and 6 deletions
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4
arch/um/include/process.h
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@@ -11,7 +11,7 @@
/* Copied from linux/compiler-gcc.h since we can't include it directly */
#define barrier() __asm__ __volatile__("": : :"memory")
extern void sig_handler(int sig, struct sigcontext sc);
extern void alarm_handler(int sig, struct sigcontext sc);
extern void sig_handler(int sig, struct sigcontext *sc);
extern void alarm_handler(int sig, struct sigcontext *sc);
#endif