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authorRusty Russell <rusty@rustcorp.com.au>2007-07-27 13:42:52 +1000
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-28 19:54:33 -0700
commit6c8dca5d53f95009d4fff00195bf38f277dc4366 (patch)
tree60cc83cf949d6e598e6dc80dc668aebd42c65540 /kernel/power/Kconfig
parenta8a11f06973fa63ad692a8f97694cb5eeb70b3f3 (diff)
downloadlinux-2.6.34-ux500-6c8dca5d53f95009d4fff00195bf38f277dc4366.tar.gz
Provide timespec to guests rather than jiffies clock.
A non-periodic clock_event_device and the "jiffies" clock don't mix well: tick_handle_periodic() can go into an infinite loop. Currently lguest guests use the jiffies clock when the TSC is unusable. Instead, make the Host write the current time into the lguest page on every interrupt. This doesn't cost much but is more precise and at least as accurate as the jiffies clock. It also gets rid of the GET_WALLCLOCK hypercall. Also, delay setting sched_clock until our clock is set up, otherwise the early printk timestamps can go backwards (not harmful, just ugly). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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