- 12 Jan, 2006 40 commits
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Al Viro authored
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Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Al Viro authored
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akpm@osdl.org authored
) From: Al Viro <viro@ftp.linux.org.uk> task_pt_regs() needs the same offset-by-8 to match copy_thread() Signed-off-by:
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akpm@osdl.org authored
) From: Al Viro <viro@ftp.linux.org.uk> rename alpha_task_regs() to task_pt_regs(), switch open-coded instances to use of the helper. Signed-off-by:
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Al Viro authored
use task_stack_page() for accesses to stack page of task in alpha-specific parts of tree Signed-off-by:
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Al Viro authored
use task_thread_info() for accesses to thread_info of task in arch/alpha and include/asm-alpha Signed-off-by:
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Al Viro authored
Patchset annotates arch/* uses of ->thread_info. Ones that really are about access of thread_info of given process are simply switched to task_thread_info(task); ones that deal with access to objects on stack are switched to new helper - task_stack_page(). A _lot_ of the latter are actually open-coded instances of "find where pt_regs are"; those are consolidated into task_pt_regs(task) (many architectures actually have such helper already). Note that these annotations are not mandatory - any code not converted to these helpers still works. However, they clean up a lot of places and have actually caught a number of bugs, so converting out of tree ports would be a good idea... As an example of breakage caught by that stuff, see i386 pt_regs mess - we used to have it open-coded in a bunch of places and when back in April Stas had fixed a bug in copy_thread(), the rest had been left out of sync. That required two followup patches (the latest - just before 2.6.15) _and_ still had left /proc/*/stat eip field broken. Try ps -eo eip on i386 and watch the junk... This patch: new helper - task_stack_page(task). Returns pointer to the memory object containing task stack; usually thread_info of task sits in the beginning of that object. Signed-off-by:
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akpm@osdl.org authored
) From: Nick Piggin <nickpiggin@yahoo.com.au> Track the last waker CPU, and only consider wakeup-balancing if there's a match between current waker CPU and the previous waker CPU. This ensures that there is some correlation between two subsequent wakeup events before we move the task. Should help random-wakeup workloads on large SMP systems, by reducing the migration attempts by a factor of nr_cpus. Signed-off-by:
Ingo Molnar <mingo@elte.hu> Signed-off-by:
Nick Piggin <npiggin@suse.de> Signed-off-by:
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