AcoSail/kernel_optimize_test
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Merge branches 'upstream/core' and 'upstream/bugfix' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen

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* 'upstream/core' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen:
  xen: allocate irq descs on any NUMA node
  xen: prevent crashes with non-HIGHMEM 32-bit kernels with largeish memory
  xen: use default_idle
  xen: clean up "extra" memory handling some more

* 'upstream/bugfix' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen:
  xen: x86/32: perform initial startup on initial_page_table
  xen: don't bother to stop other cpus on shutdown/reboot
This commit is contained in:
Linus Torvalds 2010-12-03 10:08:52 -08:00
commit 8338fded13
4 changed files with 26 additions and 35 deletions
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4
arch/x86/xen/enlighten.c
View File

@ -1021,10 +1021,6 @@ static void xen_reboot(int reason)
{
struct sched_shutdown r = { .reason = reason };
#ifdef CONFIG_SMP
stop_other_cpus();
#endif
if (HYPERVISOR_sched_op(SCHEDOP_shutdown, &r))
BUG();
}

41
arch/x86/xen/setup.c
View File

@ -181,24 +181,21 @@ char * __init xen_memory_setup(void)
for (i = 0; i < memmap.nr_entries; i++) {
unsigned long long end = map[i].addr + map[i].size;
if (map[i].type == E820_RAM) {
if (map[i].addr < mem_end && end > mem_end) {
/* Truncate region to max_mem. */
u64 delta = end - mem_end;
if (map[i].type == E820_RAM && end > mem_end) {
/* RAM off the end - may be partially included */
u64 delta = min(map[i].size, end - mem_end);
map[i].size -= delta;
extra_pages += PFN_DOWN(delta);
map[i].size -= delta;
end -= delta;
end = mem_end;
}
extra_pages += PFN_DOWN(delta);
}
if (end > xen_extra_mem_start)
if (map[i].size > 0 && end > xen_extra_mem_start)
xen_extra_mem_start = end;
/* If region is non-RAM or below mem_end, add what remains */
if ((map[i].type != E820_RAM || map[i].addr < mem_end) &&
map[i].size > 0)
/* Add region if any remains */
if (map[i].size > 0)
e820_add_region(map[i].addr, map[i].size, map[i].type);
}
@ -252,20 +249,6 @@ char * __init xen_memory_setup(void)
return "Xen";
}
static void xen_idle(void)
{
local_irq_disable();
if (need_resched())
local_irq_enable();
else {
current_thread_info()->status &= ~TS_POLLING;
smp_mb__after_clear_bit();
safe_halt();
current_thread_info()->status |= TS_POLLING;
}
}
/*
* Set the bit indicating "nosegneg" library variants should be used.
* We only need to bother in pure 32-bit mode; compat 32-bit processes
@ -362,7 +345,11 @@ void __init xen_arch_setup(void)
MAX_GUEST_CMDLINE > COMMAND_LINE_SIZE ?
COMMAND_LINE_SIZE : MAX_GUEST_CMDLINE);
pm_idle = xen_idle;
/* Set up idle, making sure it calls safe_halt() pvop */
#ifdef CONFIG_X86_32
boot_cpu_data.hlt_works_ok = 1;
#endif
pm_idle = default_idle;
fiddle_vdso();
}

12
drivers/xen/balloon.c
View File

@ -412,8 +412,16 @@ static int __init balloon_init(void)
register_balloon(&balloon_sysdev);
/* Initialise the balloon with excess memory space. */
extra_pfn_end = min(e820_end_of_ram_pfn(),
/*
* Initialise the balloon with excess memory space. We need
* to make sure we don't add memory which doesn't exist or
* logically exist. The E820 map can be trimmed to be smaller
* than the amount of physical memory due to the mem= command
* line parameter. And if this is a 32-bit non-HIGHMEM kernel
* on a system with memory which requires highmem to access,
* don't try to use it.
*/
extra_pfn_end = min(min(max_pfn, e820_end_of_ram_pfn()),
(unsigned long)PFN_DOWN(xen_extra_mem_start + xen_extra_mem_size));
for (pfn = PFN_UP(xen_extra_mem_start);
pfn < extra_pfn_end;

4
drivers/xen/events.c
View File

@ -423,7 +423,7 @@ static int find_unbound_irq(void)
if (irq == start)
goto no_irqs;
res = irq_alloc_desc_at(irq, 0);
res = irq_alloc_desc_at(irq, -1);
if (WARN_ON(res != irq))
return -1;
@ -630,7 +630,7 @@ int xen_map_pirq_gsi(unsigned pirq, unsigned gsi, int shareable, char *name)
if (identity_mapped_irq(gsi) || (!xen_initial_domain() &&
xen_pv_domain())) {
irq = gsi;
irq_alloc_desc_at(irq, 0);
irq_alloc_desc_at(irq, -1);
} else
irq = find_unbound_irq();