From f8c66c9055c669f366e04b67bc673f48e8793869 Mon Sep 17 00:00:00 2001
From: kib <kib@FreeBSD.org>
Date: Tue, 21 May 2013 11:04:00 +0000
Subject: Add ddb command 'show pginfo' which provides useful information about
 a vm page, denoted either by an address of the struct vm_page, or, if the
 '/p' modifier is specified, by a physical address of the corresponding frame.

Reviewed by:	jhb
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
---
 sys/vm/vm_page.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

(limited to 'sys/vm/vm_page.c')

diff --git a/sys/vm/vm_page.c b/sys/vm/vm_page.c
index f95013f..637fb0c 100644
--- a/sys/vm/vm_page.c
+++ b/sys/vm/vm_page.c
@@ -2884,4 +2884,27 @@ DB_SHOW_COMMAND(pageq, vm_page_print_pageq_info)
 		*vm_pagequeues[PQ_ACTIVE].pq_cnt,
 		*vm_pagequeues[PQ_INACTIVE].pq_cnt);
 }
+
+DB_SHOW_COMMAND(pginfo, vm_page_print_pginfo)
+{
+	vm_page_t m;
+	boolean_t phys;
+
+	if (!have_addr) {
+		db_printf("show pginfo addr\n");
+		return;
+	}
+
+	phys = strchr(modif, 'p') != NULL;
+	if (phys)
+		m = PHYS_TO_VM_PAGE(addr);
+	else
+		m = (vm_page_t)addr;
+	db_printf(
+    "page %p obj %p pidx 0x%jx phys 0x%jx q %d hold %d wire %d\n"
+    "  af 0x%x of 0x%x f 0x%x act %d busy %d valid 0x%x dirty 0x%x\n",
+	    m, m->object, (uintmax_t)m->pindex, (uintmax_t)m->phys_addr,
+	    m->queue, m->hold_count, m->wire_count, m->aflags, m->oflags,
+	    m->flags, m->act_count, m->busy, m->valid, m->dirty);
+}
 #endif /* DDB */
-- 
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