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    SubjectRe: [patch] Re: setitimer lowlatency-2.2.13-A1 questions
    On Tue, 7 Dec 1999, William Montgomery wrote:

    >Whoops, I saw that mentioned but did not implement. Will do that now,

    The complete patch should looks like this:

    --- 2.2.14pre11/include/asm-i386/softirq.h Fri Nov 26 20:01:33 1999
    +++ /tmp/softirq.h Tue Dec 7 16:12:21 1999
    @@ -1,6 +1,8 @@
    #ifndef __ASM_SOFTIRQ_H
    #define __ASM_SOFTIRQ_H

    +#define CHECK_IF
    +
    #include <asm/atomic.h>
    #include <asm/hardirq.h>

    @@ -30,7 +32,16 @@

    static inline void end_bh_atomic(void)
    {
    +#ifdef CHECK_IF
    + unsigned long flags;
    +
    + __save_flags(flags);
    + if (!(flags & (1 << 9)))
    + *(int *)0 = 0;
    +#endif
    atomic_dec(&global_bh_lock);
    + if (get_active_bhs())
    + do_bottom_half();
    }

    /* These are for the IRQs testing the lock */
    @@ -62,8 +73,17 @@

    extern inline void end_bh_atomic(void)
    {
    +#ifdef CHECK_IF
    + unsigned long flags;
    +
    + __save_flags(flags);
    + if (!(flags & (1 << 9)))
    + *(int *)0 = 0;
    +#endif
    barrier();
    local_bh_count[smp_processor_id()]--;
    + if (get_active_bhs())
    + do_bottom_half();
    }

    /* These are for the irq's testing the lock */
    @@ -121,10 +141,17 @@
    {
    unsigned long flags;

    +#ifdef CHECK_IF
    + __save_flags(flags);
    + if (!(flags & (1 << 9)))
    + *(int *)0 = 0;
    +#endif
    spin_lock_irqsave(&i386_bh_lock, flags);
    if (atomic_dec_and_test(&bh_mask_count[nr]))
    bh_mask |= 1 << nr;
    spin_unlock_irqrestore(&i386_bh_lock, flags);
    + if (get_active_bhs())
    + do_bottom_half();
    }

    #endif /* __ASM_SOFTIRQ_H */
    Andrea


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