[lkml]   [2008]   [Apr]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    Patch in this message
    SubjectRe: [bug] SLUB + mm/slab.c boot crash in -rc9

    you asked me to run with the debug patch attached below. I just tried
    vanilla -rc9 (head 120dd64cacd4fb7) and it still crashes with this

    debug output is:

    so it's probably the first few page allocations (setup_cpu_cache())
    going wrong already - suggesting a some fundamental borkage in SLAB?

    note, when i change SLAB to SLUB (and keep the config unchanged
    otherwise), i get a similar early crash:

    i've also uploaded a bzImage (SLUB, debug patch not applied) that you
    can pick up and run on any 32-bit test-system:

    it's a relatively generic bzImage that should boot on most whitebox PCs
    on most distros as long as you use a pure ext3 setup and might even give
    you networking (no modules or initrd is needed). It boots fine on two
    other 32-bit PCs i have (an Intel laptop and an AMD desktop).


    Index: linux/mm/page_alloc.c
    --- linux.orig/mm/page_alloc.c
    +++ linux/mm/page_alloc.c
    @@ -1485,6 +1485,7 @@ restart:
    * Happens if we have an empty zonelist as a result of
    * GFP_THISNODE being used on a memoryless node
    + WARN_ON(1);
    return NULL;

    Index: linux/mm/slab.c
    --- linux.orig/mm/slab.c
    +++ linux/mm/slab.c
    @@ -1682,6 +1682,7 @@ static void *kmem_getpages(struct kmem_c
    flags |= __GFP_RECLAIMABLE;

    page = alloc_pages_node(nodeid, flags, cachep->gfporder);
    + WARN_ON(!page);
    if (!page)
    return NULL;

    @@ -2620,6 +2621,7 @@ static struct slab *alloc_slabmgmt(struc
    /* Slab management obj is off-slab. */
    slabp = kmem_cache_alloc_node(cachep->slabp_cache,
    local_flags & ~GFP_THISNODE, nodeid);
    + WARN_ON(!slabp);
    if (!slabp)
    return NULL;
    } else {

     \ /
      Last update: 2008-04-15 08:29    [W:0.022 / U:6.344 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site