Author: alc
Date: Sun May 16 19:25:56 2010
New Revision: 208164
URL: http://svn.freebsd.org/changeset/base/208164
Log:
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
Modified:
head/sys/vm/vm_page.c
Modified: head/sys/vm/vm_page.c
==============================================================================
--- head/sys/vm/vm_page.c Sun May 16 19:01:32 2010 (r208163)
+++ head/sys/vm/vm_page.c Sun May 16 19:25:56 2010 (r208164)
@@ -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
_______________________________________________
svn-src-head@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/svn-src-head
To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
