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authorStephane Eranian <eranian@hpl.hp.com>2006-07-09 21:12:39 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-07-09 18:47:12 -0700
commitb3cf257623fabd8f1ee6700a6d328cc1c5da5a1d (patch)
tree28b98f21dd108864d2edc11d179cb48c118b2cf8 /fs
parent09075ef0fd585fb093bb9a6cd1240272114f89cf (diff)
[PATCH] i386: use thread_info flags for debug regs and IO bitmaps
Use thread info flags to track use of debug registers and IO bitmaps. - add TIF_DEBUG to track when debug registers are active - add TIF_IO_BITMAP to track when I/O bitmap is used - modify __switch_to() to use the new TIF flags Performance tested on Pentium II, ten runs of LMbench context switch benchmark (smaller is better:) before after avg 3.65 3.39 min 3.55 3.33 Signed-off-by: Stephane Eranian <eranian@hpl.hp.com> Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com> Acked-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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