lkml.org 
[lkml]   [2004]   [Mar]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: Migrate pages from a ccNUMA node to another - patch
    Hirokazu Takahashi wrote:

    [...]
    >
    > It's not hard to add "no-retry-mode" to "remap_onepage()" function
    > if you want. It may skip to migrate some pages if they are accessed
    > heavily. In paticular if you only want to care about anonymous pages,
    > they will be handled very well.

    Well, why not to give it a try ?
    Yet your code is not really easy to read. :-)
    I do not dare to adapt it on my own, I am afraid of breaking something.
    Could you please provide me a modified version of your "remap_onepage()" ?
    Can we move to 2.6.4 ?

    In addition to "no-retry-mode", I need to specify where the new page
    should be allocated from.

    Here is my interface I need to implement with "remap_onepage()":

    /*
    * Common part of checking & migrating the pages one by one.
    *
    * Arguments: src_node: Source NUMA node
    * old_p: -> old page structure
    * node: Destination NUMA node
    * mm: -> victim "mm_struct"
    * pte: -> PTE of the page to be moved
    *
    * Returns: 1: Migration O. K.
    * 0: Minor error, no actual migration has been done
    * -Exxx: Catastrophic error
    *
    * Notes: - "mm->page_table_lock" and "mm->mmap_sem" have to be held.
    * - The old page is "get_page()"-ed on entry to make sure it does not go
    * away in the mean time - on return it gets "put_page()"-ed.
    */
    int
    common_check_migrate_1_page(const int src_node, struct page * const old_p,
    const int node, struct mm_struct * const mm, pte_t * const pte)

    Notes: "pte" can be NULL if I do not know it apriori
    I cannot release "mm->page_table_lock" otherwise I have to re-scan the "mm->pgd".

    Thanks,

    Zoltán Menyhárt
    -
    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: 2005-03-22 14:02    [W:3.428 / U:0.044 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site