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When making large programs in pkgsrc, I sometimes get uvm_fault()s. This 
happened when building Thunderbird and xine-ui(twice, first while in x11 
and second when I tried in console to be able to catch db(1)). Here's 
the relevant uvm_fault() of the second instance (when building xine-lib):

uvm_fault(0x0686fa0, 0xcd0d6000, 0, 2) -> 0xe
kernel: supervisor trap page fault, code=0
Stopped in pid 25580.1 (sh) at	netbsd:cache_lookup+0x136:	movl	%edx,0(%eax)

Backtrace:

cache_lookup(cad6ddc8,cbcf3e74,cbcf3e88,0,1) at netbsd:cache_lookup+0x136
ufs_lookup(cbcf3d74,cbb154d4,cbcf3d8c,c0358a6a,c05478e0) at 
netbsd:ufs_lookup+0xc7
VOP_LOOKUP(cad6ddc8,cbcf3e74,cbcf3e88,1,c196beac) at netbsd:VOP_LOOKUP+0x2e
lookup(cbcf3e64,cad70800,400,cbcf3e7c,1) at netbsd:lookup+0x1fd
namei(cbcf3e64,5,c1343b00,8,8062fac) at netbsd:namei+0xf8
sys___stat30(cbb188c8,cbcf3f64,cbcf3f5c,0,202) at netbsd:sys___stat30+0x58
syscall_plain() at netbsd:syscall_plain+0x7e
--- syscall (number 387) ---
0xbbb9d03f:

Then, when I enter 'sync':

syncing disks... uvm_fault(0x0686fa0, 0xcd0d0000, 0, 1) -> 0xe

Next try of sync finishes properly. The coredump is available on 
request. I have no real clue as to why this happens, but I suspect it 
happens as soon as UVM tries to swap pages out.

Cheers,
-- 
		-- Thomas E. Spanjaard
		   tgen@netphreax.net

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