On Thu, Feb 10, 2005 at 02:26:52PM -0500, Dan Malek wrote: > > On Feb 10, 2005, at 10:04 AM, Marcelo Tosatti wrote: > > >Does anyone have a clue of what is/can be wrong with the TLB entry for > >the > >address being flushed at __flush_dcache_icache()? > > Not sure. The problem is that the __flush_dcache_icache is passed a > user space virtual address that doesn't look like it is mapped for > writing > or something. I don't know, as an ooops isn't sufficient to debug the > problem. > You have to catch it here and track down the current state of the TLB > and > the page tables. Of course, when I do this everything looks OK,
How do you do track down the current TLB state? With a BDI? > so what I've been trying to do is catch the TLBmiss reload that actually > causes > this > to happen to see what it really tried to load into the tlb. Shouldnt it be loading the TLB entry which "seem to be OK" accordingly to your analysis ?? > A much more > challenging project :-) I'll get it one of these days ..... I see... thanks for your help. BTW, we are seeing very bad slowdown on v2.4 compared to v2.6 on m8xx. Its likely to be cache related - I'm preparing a detailed email about it.
