Messages in this thread | | | Date | Sun, 18 Jul 1999 19:35:42 +0200 (CEST) | From | Ingo Molnar <> | Subject | Re: gdb strangness Under 2.3.11-pre1 |
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On Sun, 18 Jul 1999, Tim Waugh wrote:
> > [there is another x86 change that went in as well recently with > > pre-2.3.11, the 'lazy TLB flush feature' which was planned for quite some > > time already - bug the gdb bug predates the lazy-TLB-flush changes. The > > lazy-TLB feature lets us cut down on the number of TLB flushes rather > > heavily, in a typical x86 Linux box about 80-90% of TLB flushes are now > > gone.] > > The two bugs that seem to be caused by this (or at least, are introduced > with 2.3.11-pre4) are the weird things in /proc/{2,3} and the 'bad page > middle entry 23232323'-type messages.
i saw those too, hm. One thing to keep in mind is that 'lazy TLB state' makes bugs live much longer than they live now, so lazy-TLB might just have triggered an existing bug.
btw., in case you can reproduce the 'bad page middle entry ...' messages, do they go away if you remove the lazy-TLB support for bdflush? (the PF_LAZY_TLB changes in buffer.c)
-- mingo
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