Summary: | kernel crashes early in pmap_map when pxe booted with rootfs in memory | ||
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Product: | Base System | Reporter: | longwitz |
Component: | kern | Assignee: | Mark Linimon <linimon> |
Status: | Closed Overcome By Events | ||
Severity: | Affects Some People | CC: | longwitz |
Priority: | --- | Keywords: | regression |
Version: | 10.3-STABLE | ||
Hardware: | i386 | ||
OS: | Any |
Description
longwitz
2017-01-30 15:06:13 UTC
The problem was caused by the size of my kernel and mfsroot. In my case I need at boot 68 MB of physical memory (17 page table pages). The kernel needs 18 page table pages for the vm_page_array (/sys/i386/include/pmap.h). Therefore the default for NKPT=30 is too low. After raising this to NKPT=36 in the kernel source the crash has gone. This PR can be closed. Closed at submitter's request. |