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kern/40088: uvm_fault while using tmpfs
>Synopsis: uvm_fault while using tmpfs
>Arrival-Date: Wed Dec 03 00:55:00 +0000 2008
>Originator: Chris Gilbert
>Release: NetBSD -current 2008-12-02
NetBSD 5.99.4 NetBSD 5.99.4 (GENERIC) #3: Tue Dec 2 21:32:04 GMT 2008
While building on a 24 core machine (having just disabled 12 cores) tmpfs
generated a uvm_fault:
uvm_fault(0xffff80012b442e70, 0x0, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip ffffffff804471b7 cs 8 rflags 10286 cr2 10 cpl 7 rsp
turnstile_block() at netbsd:turnstile_block+0x147
mutex_vector_enter() at netbsd:mutex_vector_enter+0x318
tmpfs_alloc_vp() at netbsd:tmpfs_alloc_vp+0x29
tmpfs_lookup() at netbsd:tmpfs_lookup+0x17d
VOP_LOOKUP() at netbsd:VOP_LOOKUP+0x63
getcwd_common() at netbsd:getcwd_common+0x304
sys___getcwd() at netbsd:sys___getcwd+0xc3
syscall() at netbsd:syscall+0xb6
I mounted tmpfs as:
mount -t tmpfs tmpfs /tmpfs
The server has 64GB of RAM. At the time it tmpfs had a full source and objdir
The server also has no Swap configured, so no dump was made.
No ECC errors are shown in the iLO/IML logs.
build and delete multiple builds.
I'd probably done ~6 builds on the server before the panic happened.
Note that I'd ctrl^C'd the currently running build, which had just started.
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