bitkeeper revision 1.1159.170.27 (4199eb03e15gd8adslXoDx2C8r41ow)

Merge freefall.cl.cam.ac.uk:/auto/groups/xeno/BK/xeno.bk
into freefall.cl.cam.ac.uk:/local/scratch/kaf24/xeno

6 files changed, 15 insertions, 10 deletions

diff --git a/linux-2.6.9-xen-sparse/arch/xen/configs/xen0_defconfig b/linux-2.6.9-xen-sparse/arch/xen/configs/xen0_defconfig
index 44797f293e..1532ab3dfb 100644
--- a/linux-2.6.9-xen-sparse/arch/xen/configs/xen0_defconfig
+++ b/linux-2.6.9-xen-sparse/arch/xen/configs/xen0_defconfig
@@ -158,7 +158,7 @@ CONFIG_MAGIC_SYSRQ=y
 # CONFIG_DEBUG_INFO is not set
 # CONFIG_DEBUG_SPINLOCK_SLEEP is not set
 # CONFIG_FRAME_POINTER is not set
-# CONFIG_4KSTACKS is not set
+CONFIG_4KSTACKS=y
 CONFIG_X86_BIOS_REBOOT=y
 CONFIG_X86_STD_RESOURCES=y
 CONFIG_PC=y
diff --git a/linux-2.6.9-xen-sparse/arch/xen/configs/xenU_defconfig b/linux-2.6.9-xen-sparse/arch/xen/configs/xenU_defconfig
index 1d1ec8135a..24c57a3f50 100644
--- a/linux-2.6.9-xen-sparse/arch/xen/configs/xenU_defconfig
+++ b/linux-2.6.9-xen-sparse/arch/xen/configs/xenU_defconfig
@@ -119,7 +119,7 @@ CONFIG_HAVE_DEC_LOCK=y
 CONFIG_EARLY_PRINTK=y
 # CONFIG_DEBUG_SPINLOCK_SLEEP is not set
 # CONFIG_FRAME_POINTER is not set
-# CONFIG_4KSTACKS is not set
+CONFIG_4KSTACKS=y
 CONFIG_X86_BIOS_REBOOT=y
 CONFIG_X86_STD_RESOURCES=y
 CONFIG_PC=y
diff --git a/linux-2.6.9-xen-sparse/arch/xen/i386/kernel/setup.c b/linux-2.6.9-xen-sparse/arch/xen/i386/kernel/setup.c
index e10a0aaf97..c9574a4311 100644
--- a/linux-2.6.9-xen-sparse/arch/xen/i386/kernel/setup.c
+++ b/linux-2.6.9-xen-sparse/arch/xen/i386/kernel/setup.c
@@ -1319,6 +1319,11 @@ void __init setup_arch(char **cmdline_p)
 
         unsigned long max_low_pfn;
 
+	/* Force a quick death if the kernel panics. */
+	extern int panic_timeout;
+	if ( panic_timeout == 0 )
+		panic_timeout = 1;
+
 	HYPERVISOR_vm_assist(VMASST_CMD_enable,
 			     VMASST_TYPE_4gb_segments);
 
diff --git a/linux-2.6.9-xen-sparse/arch/xen/i386/mm/pageattr.c b/linux-2.6.9-xen-sparse/arch/xen/i386/mm/pageattr.c
index 19f9d9c525..74f3b150df 100644
--- a/linux-2.6.9-xen-sparse/arch/xen/i386/mm/pageattr.c
+++ b/linux-2.6.9-xen-sparse/arch/xen/i386/mm/pageattr.c
@@ -119,7 +119,7 @@ __change_page_attr(struct page *page, pgprot_t prot)
 		if ((pte_val(*kpte) & _PAGE_PSE) == 0) { 
 			pte_t old = *kpte;
 			pte_t standard = mk_pte(page, PAGE_KERNEL); 
-			set_pte_atomic(kpte, mk_pte(page, prot)); 
+			set_pte_batched(kpte, mk_pte(page, prot)); 
 			if (pte_same(old,standard))
 				get_page(kpte_page);
 		} else {
@@ -130,7 +130,7 @@ __change_page_attr(struct page *page, pgprot_t prot)
 			set_pmd_pte(kpte,address,mk_pte(split, PAGE_KERNEL));
 		}	
 	} else if ((pte_val(*kpte) & _PAGE_PSE) == 0) { 
-		set_pte_atomic(kpte, mk_pte(page, PAGE_KERNEL));
+		set_pte_batched(kpte, mk_pte(page, PAGE_KERNEL));
 		__put_page(kpte_page);
 	}
 
@@ -171,6 +171,7 @@ int change_page_attr(struct page *page, int numpages, pgprot_t prot)
 		if (err) 
 			break; 
 	} 	
+	flush_page_update_queue();
 	spin_unlock_irqrestore(&cpa_lock, flags);
 	return err;
 }
diff --git a/linux-2.6.9-xen-sparse/arch/xen/kernel/evtchn.c b/linux-2.6.9-xen-sparse/arch/xen/kernel/evtchn.c
index 0041caa9bf..9648518ae8 100644
--- a/linux-2.6.9-xen-sparse/arch/xen/kernel/evtchn.c
+++ b/linux-2.6.9-xen-sparse/arch/xen/kernel/evtchn.c
@@ -467,6 +467,8 @@ void __init init_IRQ(void)
 {
     int i;
 
+    irq_ctx_init(0);
+
     spin_lock_init(&irq_mapping_update_lock);
 
     /* No VIRQ -> IRQ mappings. */
diff --git a/linux-2.6.9-xen-sparse/include/asm-xen/asm-i386/pgtable-2level.h b/linux-2.6.9-xen-sparse/include/asm-xen/asm-i386/pgtable-2level.h
index aa23bd9d55..7000c5dbe8 100644
--- a/linux-2.6.9-xen-sparse/include/asm-xen/asm-i386/pgtable-2level.h
+++ b/linux-2.6.9-xen-sparse/include/asm-xen/asm-i386/pgtable-2level.h
@@ -23,13 +23,10 @@ static inline int pgd_present(pgd_t pgd)	{ return 1; }
  * within a page table are directly modified.  Thus, the following
  * hook is made available.
  */
-#ifdef CONFIG_XEN_WRITABLE_PAGETABLES
+#define set_pte_batched(pteptr, pteval) \
+queue_l1_entry_update(pteptr, (pteval).pte_low)
 #define set_pte(pteptr, pteval) (*(pteptr) = pteval)
-#define set_pte_atomic(pteptr, pteval) (*(pteptr) = pteval)
-#else
-#define set_pte(pteptr, pteval) xen_l1_entry_update(pteptr, (pteval).pte_low)
-#define set_pte_atomic(pteptr, pteval) xen_l1_entry_update(pteptr, (pteval).pte_low)
-#endif
+#define set_pte_atomic(pteptr, pteval) set_pte(pteptr,pteval)
 /*
  * (pmds are folded into pgds so this doesn't get actually called,
  * but the define is needed for a generic inline function.)