lkml.org 
[lkml]   [2006]   [Mar]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    Subject[PATCH: 002/002] Catch notification of memory add event of ACPI via container driver.(avoid redundant call add_memory)
    When acpi_memory_device_init() is called at boottime to
    register struct memory acpi_memory_device,
    acpi_bus_add() are called via acpi_driver_attach().

    But it also calls ops->start() function.
    It is called even if the memory blocks are initialized at
    early boottime. In this case add_memory() return -EEXIST, and
    the memory blocks becomes INVALID state even if it is normal.

    This is patch to avoid calling add_memory() for already available memory.

    Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com>

    drivers/acpi/acpi_memhotplug.c | 11 +++++++++++
    1 files changed, 11 insertions(+)

    Index: pgdat9/drivers/acpi/acpi_memhotplug.c
    ===================================================================
    --- pgdat9.orig/drivers/acpi/acpi_memhotplug.c 2006-03-23 19:59:01.000000000 +0900
    +++ pgdat9/drivers/acpi/acpi_memhotplug.c 2006-03-23 20:20:04.000000000 +0900
    @@ -234,6 +234,17 @@ static int acpi_memory_enable_device(str
    * (i.e. memory-hot-remove function)
    */
    list_for_each_entry(info, &mem_device->res_list, list) {
    + u64 start_pfn, end_pfn;
    +
    + start_pfn= info->start_addr >> PAGE_SHIFT;
    + end_pfn = (info->start_addr + info->length - 1) >> PAGE_SHIFT;
    +
    + if (pfn_valid(start_pfn) || pfn_valid(end_pfn)){
    + /* already enabled. try next area */
    + num_enabled++;
    + continue;
    + }
    +
    result = add_memory(info->start_addr, info->length);
    if (result)
    continue;
    --
    Yasunori Goto


    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2006-03-23 14:47    [W:0.020 / U:90.308 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site