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Correct an error of omission in r202897: Now that amd64 uses the direct map

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to access the message buffer, we must explicitly request that the underlying
physical pages are included in a crash dump.

Reported by:	Benjamin Kaduk
This commit is contained in:
Alan Cox 2010-05-16 19:25:56 +00:00
parent 4dea0435b5
commit a4bc2c8929
1 changed files with 14 additions and 0 deletions
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14
sys/vm/vm_page.c
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@ -108,6 +108,7 @@ __FBSDID("$FreeBSD$");
#include <sys/kernel.h>
#include <sys/limits.h>
#include <sys/malloc.h>
#include <sys/msgbuf.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/sysctl.h>
@ -374,6 +375,19 @@ vm_page_startup(vm_offset_t vaddr)
vm_page_dump = (void *)(uintptr_t)pmap_map(&vaddr, new_end,
new_end + vm_page_dump_size, VM_PROT_READ | VM_PROT_WRITE);
bzero((void *)vm_page_dump, vm_page_dump_size);
#endif
#ifdef __amd64__
/*
* Request that the physical pages underlying the message buffer be
* included in a crash dump. Since the message buffer is accessed
* through the direct map, they are not automatically included.
*/
pa = DMAP_TO_PHYS((vm_offset_t)msgbufp->msg_ptr);
last_pa = pa + round_page(MSGBUF_SIZE);
while (pa < last_pa) {
dump_add_page(pa);
pa += PAGE_SIZE;
}
#endif
/*
* Compute the number of pages of memory that will be available for