>> diff --git a/arch/sparc/mm/tsb.c b/arch/sparc/mm/tsb.c
>> index 9eb10b4..24dcd29 100644
>> --- a/arch/sparc/mm/tsb.c
>> +++ b/arch/sparc/mm/tsb.c
>> @@ -6,6 +6,7 @@
>> #include <linux/kernel.h>
>> #include <linux/preempt.h>
>> #include <linux/slab.h>
>> +#include <linux/locallock.h>
>> #include <asm/page.h>
>> #include <asm/pgtable.h>
>> #include <asm/mmu_context.h>
>> @@ -14,6 +15,7 @@
>> #include <asm/oplib.h>
>>
>> extern struct tsb swapper_tsb[KERNEL_TSB_NENTRIES];
>> +static DEFINE_LOCAL_IRQ_LOCK(tsb_lock);
>>
>> static inline unsigned long tsb_hash(unsigned long vaddr, unsigned long hash_sh
>> {
>> @@ -71,9 +73,9 @@ static void __flush_tsb_one(struct tlb_batch *tb, unsigned lon
>> void flush_tsb_user(struct tlb_batch *tb)
>> {
>> struct mm_struct *mm = tb->mm;
>> - unsigned long nentries, base, flags;
>> + unsigned long nentries, base;
>>
>> - raw_spin_lock_irqsave(&mm->context.lock, flags);
>> + local_lock(tsb_lock);
>>
>> base = (unsigned long) mm->context.tsb_block[MM_TSB_BASE].tsb;
>> nentries = mm->context.tsb_block[MM_TSB_BASE].tsb_nentries;
>> @@ -90,7 +92,7 @@ void flush_tsb_user(struct tlb_batch *tb)
>> __flush_tsb_one(tb, HPAGE_SHIFT, base, nentries);
>> }
>> #endif
>> - raw_spin_unlock_irqrestore(&mm->context.lock, flags);
>> + local_unlock(tsb_lock);
>
> It seems to be not good for me. Tsb setup is in tsb_grow() and it must
> be synchronized with flushing. Flushing is also being made in flush_tsb_user_page()..
>
> Which last stack stack has you received with tb->active, permanently set to zero?
>
I agree with you point about flushing in flush_tbs_user_page too. Like i said, this is
a bit tricky to actually debug.
Yes, tb->active was set to zero.
- Allen
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