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author | alc <alc@FreeBSD.org> | 2010-05-16 19:25:56 +0000 |
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committer | alc <alc@FreeBSD.org> | 2010-05-16 19:25:56 +0000 |
commit | 862dd3e32604da80d67e56a2e31e84c205bf88d3 (patch) | |
tree | aeb64fa048d6cb3401ece729923f114402724006 /sys/vm/vm_page.c | |
parent | 14881a2b1c1a24b61a02dfbb7858d12a3714afbf (diff) | |
download | FreeBSD-src-862dd3e32604da80d67e56a2e31e84c205bf88d3.zip FreeBSD-src-862dd3e32604da80d67e56a2e31e84c205bf88d3.tar.gz |
Correct an error of omission in r202897: Now that amd64 uses the direct map
to access the message buffer, we must explicitly request that the underlying
physical pages are included in a crash dump.
Reported by: Benjamin Kaduk
Diffstat (limited to 'sys/vm/vm_page.c')
-rw-r--r-- | sys/vm/vm_page.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/sys/vm/vm_page.c b/sys/vm/vm_page.c index 69d3ac2..e70ca3f 100644 --- a/sys/vm/vm_page.c +++ b/sys/vm/vm_page.c @@ -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> @@ -375,6 +376,19 @@ vm_page_startup(vm_offset_t vaddr) 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 * use (taking into account the overhead of a page structure per |