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Re: UVM Fault

It appears to be fixed. Its working with a kernel built from source updated 2008-06-17 14:30:00 UTC

Manuel Bouyer wrote:
On Mon, Jun 16, 2008 at 12:15:12PM +1000, Sarton O'Brien wrote:
On Sat, 14 Jun 2008 06:37:25 pm Mike Pumford wrote:
John R. Shannon wrote:
Started happening immediately upon upgrade to 4.99.64:

DOMU runs squid proxy. Repeatable fault occurs on forst web access via
squid. Works if previous 4.99.63 kernel is used in DOMU.

Seeing something similar here on a quad core 4.99.64 on amd64.
Here's the trace with registers as requested:

Jun 16 12:04:59 squid[12711]: Squid Parent: child process 21641 started
uvm_fault(0xffffa000141a1720, 0x0, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip ffffffff803a34a6 cs e030 rflags 10282 cr2 0 cpl 0 rsp ffffa00013be7810
kernel: page fault trap, code=0
Stopped in pid 16282.1 (pinger) at netbsd:rb_tree_insert_node+0x26: m
ovq     0(%rax),%r14
rb_tree_insert_node() at netbsd:rb_tree_insert_node+0x26
uvm_pagealloc_strat() at netbsd:uvm_pagealloc_strat+0x2d2

I've seen some commits from yamt@ about UVM and rb_tree. Maybe this is fixed
now ...


John R. Shannon

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