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    SubjectRe: [Bugme-new] [Bug 13690] New: nodes_clear cause hugepage unusable on non-NUMA machine

    (switched to email. Please respond via emailed reply-to-all, not via the
    bugzilla web interface).

    On Thu, 2 Jul 2009 01:22:24 GMT bugzilla-daemon@bugzilla.kernel.org wrote:

    > http://bugzilla.kernel.org/show_bug.cgi?id=13690
    >
    > Summary: nodes_clear cause hugepage unusable on non-NUMA
    > machine
    > Product: Platform Specific/Hardware
    > Version: 2.5
    > Kernel Version: 2.6.31-rc1
    > Platform: All
    > OS/Version: Linux
    > Tree: Mainline
    > Status: NEW
    > Severity: high
    > Priority: P1
    > Component: i386
    > AssignedTo: platform_i386@kernel-bugs.osdl.org
    > ReportedBy: alex.shi@intel.com
    > CC: yinghai@kernel.org
    > Regression: Yes
    >
    >
    > 73d60b7f747176dbdff826c4127d22e1fd3f9f74 commit introduced a nodes_clear
    > function for NUMA machine. But seems the commit omits non-NUMA machine.
    > If find_zone_movable_pfns_for_nodes/early_calculate_totalpages has no
    > chance to run. nodes_clear will block HUPEPAGE using in my specjbb2005
    > testing on my Stoakely(i386/x86_64), waybridge(i386), IBM T61(i386)
    >
    > + /*
    > + * find_zone_movable_pfns_for_nodes/early_calculate_totalpages init
    > + * that node_mask, clear it at first
    > + */
    > + nodes_clear(node_states[N_HIGH_MEMORY]);

    Thanks.

    fyi, with recently-occurring bugs and regressions of this nature, it is (I
    think) best to deal with them via email rather than bugzilla. Bugzilla is
    better-suited to longer-lived bugs where we have a need to track them,
    generate statistics, etc.



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