Subject: + sched-inline-the-need_resched-test-into-the-caller-for-_cond_resched.patch added to -mm tree To: ak@xxxxxxxxxxxxxxx,a.p.zijlstra@xxxxxxxxx,hpa@xxxxxxxxx,mingo@xxxxxxx,tglx@xxxxxxxxxxxxx From: akpm@xxxxxxxxxxxxxxxxxxxx Date: Tue, 20 Aug 2013 13:12:33 -0700 The patch titled Subject: sched: inline the need_resched test into the caller for _cond_resched has been added to the -mm tree. Its filename is sched-inline-the-need_resched-test-into-the-caller-for-_cond_resched.patch This patch should soon appear at http://ozlabs.org/~akpm/mmots/broken-out/sched-inline-the-need_resched-test-into-the-caller-for-_cond_resched.patch and later at http://ozlabs.org/~akpm/mmotm/broken-out/sched-inline-the-need_resched-test-into-the-caller-for-_cond_resched.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Andi Kleen <ak@xxxxxxxxxxxxxxx> Subject: sched: inline the need_resched test into the caller for _cond_resched _cond_resched does at least two explicit calls just to decide to do nothing: _cond_resched and should_resched(). Inline a need_resched() into the caller to avoid these calls in the common case of no reschedule being needed. Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx> Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: "H. Peter Anvin" <hpa@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- include/linux/sched.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff -puN include/linux/sched.h~sched-inline-the-need_resched-test-into-the-caller-for-_cond_resched include/linux/sched.h --- a/include/linux/sched.h~sched-inline-the-need_resched-test-into-the-caller-for-_cond_resched +++ a/include/linux/sched.h @@ -2442,7 +2442,7 @@ extern int __cond_resched_softirq(void); #ifdef CONFIG_PREEMPT_VOLUNTARY extern int _cond_resched(void); -# define might_resched() _cond_resched() +# define might_resched() (need_resched() ? _cond_resched() : 0) #else # define might_resched() do { } while (0) #endif _ Patches currently in -mm which might be from ak@xxxxxxxxxxxxxxx are thp-account-anon-transparent-huge-pages-into-nr_anon_pages.patch mm-cleanup-add_to_page_cache_locked.patch thp-move-maybe_pmd_mkwrite-out-of-mk_huge_pmd.patch thp-do_huge_pmd_anonymous_page-cleanup.patch thp-consolidate-code-between-handle_mm_fault-and-do_huge_pmd_anonymous_page.patch mm-migrate-make-core-migration-code-aware-of-hugepage.patch mm-soft-offline-use-migrate_pages-instead-of-migrate_huge_page.patch migrate-add-hugepage-migration-code-to-migrate_pages.patch mm-migrate-add-hugepage-migration-code-to-move_pages.patch mm-mbind-add-hugepage-migration-code-to-mbind.patch mm-migrate-remove-vm_hugetlb-from-vma-flag-check-in-vma_migratable.patch mm-memory-hotplug-enable-memory-hotplug-to-handle-hugepage.patch mm-migrate-check-movability-of-hugepage-in-unmap_and_move_huge_page.patch mm-prepare-to-remove-proc-sys-vm-hugepages_treat_as_movable.patch mm-prepare-to-remove-proc-sys-vm-hugepages_treat_as_movable-v2.patch mm-mempolicy-rename-check_range-to-queue_pages_range.patch kernel-modsign_pubkeyc-fix-init-const-for-module-signing-code.patch lto-watchdog-hpwdtc-make-assembler-label-global.patch syscallsh-use-gcc-alias-instead-of-assembler-aliases-for-syscalls.patch scripts-mod-modpostc-handle-non-abs-crc-symbols.patch x86-add-1-2-4-8-byte-optimization-to-64bit-__copy_fromto_user_inatomic.patch x86-include-linux-schedh-in-asm-uaccessh.patch tree-sweep-include-linux-schedh-for-might_sleep-users.patch move-might_sleep-and-friends-from-kernelh-to-schedh.patch sched-mark-should_resched-__always_inline.patch sched-inline-the-need_resched-test-into-the-caller-for-_cond_resched.patch linux-next.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html