Hi, preempt stuff SHOULD only stay in #ifdef CONFIG_PREEMP_* , but it is messing with everyone even though not defined.
e.g. 1. linux-2.6.19/kernel/spinlock.c Line 18: #include <linux/preempt.h> Line 26: preempt_disable(); Line 32: preempt_disable(); and so on . 2. linux-2.6.19/kernel/sched.c Line 1096: int preempted; Line 1104: preempted = !task_running(rq, p); Line 1106: if (preempted) Line 2059: if (TASK_PREEMPTS_CURR(p, this_rq)) Line 3355: current->comm, preempt_count(), current->pid); Line 3342: preempt_disable(); Line 3375: if (prev->state && !(preempt_count() & PREEMPT_ACTIVE)) { Line 3471: preempt_enable_no_resched(); 3. linux-2.6.19/kernel/timer.c Line 444: int preempt_count = preempt_count(); Line 447: if (preempt_count != preempt_count()) { 4. linux-2.6.19/arch/i386/kernel/entry.S Line 240: preempt_stop 5. linux-2.6.19/arch/i386/irq.c Line 111: irqctx->tinfo.preempt_count = Line 112: (irqctx->tinfo.preempt_count & ~SOFTIRQ_MASK) | Line 113: (curctx->tinfo.preempt_count & SOFTIRQ_MASK); Line 160: irqctx->tinfo.preempt_count = HARDIRQ_OFFSET; and so on. Similarly unnecessary preempt code is also written in other important files. 70 to 80 % of this code is removed when compiled. but 20 to 30 % code left in binary kernel image. Why Linux kernel is wasting its resources which is not defined at all. Any solution ? Thank you, Best Regards, Jaswinder Singh. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/