Hi Len,
I have tested more than 10000 times of cpu remove and add function in the latest kernel. The result of test is ok. The flow of my test program is bellow:
(1) get random number of cpu .
(2) call xm vcpu-set <n> . depend on current cpu number. it simulate the function of add or remove cpu at random.
(3) get the random number between 1 and 10.
(4) sleep random seconds which get from step 3.
(5) repeat from step 1 to step 4.
what's your opinion of this patch?
--
shencanquan
________________________________________
发件人: linux-kernel-owner@xxxxxxxxxxxxxxx [linux-kernel-owner@xxxxxxxxxxxxxxx] 代表 Shen Canquan [shencanquan@xxxxxxxxxx]
发送时间: 2011年8月30日 14:35
到: lenb@xxxxxxxxxx; rui.zhao@xxxxxxxxx; shemminger@xxxxxxxxxx; yakui.zhao@xxxxxxxxx
Cc: xiaowei.yang@xxxxxxxxxx; hanweidong; linux-kernel@xxxxxxxxxxxxxxx; i@xxxxxxxxxxxxxxx
主题: [PATCH] acpi: Fix hot cpu remove problem on acpi subsystem
In Xen virtualization environment, When I used xen tools (xm vcpu-set vcpu_number ) to test the vcpu add and remove, I found it is failure on vcpu remove, I found the reason is that nothing to do when cpu remove in acpi_processor_hotplug_notify function, so I add the code of send the OFFLINE message to udev and add the rule of udev. it is ok on vcpu remove.
Signed-off-by: Shen canquan <shencanquan@xxxxxxxxxx>
---
drivers/acpi/processor_driver.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c
index a4e0f1b..a1c564f 100644
--- a/drivers/acpi/processor_driver.c
+++ b/drivers/acpi/processor_driver.c
@@ -677,6 +677,8 @@ static void acpi_processor_hotplug_notify(acpi_handle handle,
"Driver data is NULL, dropping EJECT\n");
return;
}
+
+ kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE);
break;
default:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
--
1.7.6.msysgit.0
--
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