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    SubjectRe: [2.4.9 SMP] alloc_pages failed
    Date
    (reposted to correct cut & pasted errors)

    On September 2, 2001 03:14 pm, Igor Mozetic wrote:
    > My box is dual Xeon 550, Intel C440GX+, 2GB RAM, AIC7XXX.
    > Last night I got log full of the following:
    >
    > Sep 2 04:00:46 jerolim kernel: __alloc_pages: 0-order allocation failed.
    > Sep 2 04:00:47 jerolim last message repeated 208 times
    > Sep 2 04:00:47 jerolim kernel: ed.

    Could you please apply this patch so we can see which kind of allocation is
    failing (patch -p0):

    --- 2.4.9.clean/mm/page_alloc.c Thu Aug 16 12:43:02 2001
    +++ 2.4.9/mm/page_alloc.c Mon Aug 20 22:05:40 2001
    @@ -502,7 +502,8 @@
    }

    /* No luck.. */
    - printk(KERN_ERR "__alloc_pages: %lu-order allocation failed.\n", order);
    + printk(KERN_ERR "__alloc_pages: %lu-order allocation failed (gfp=0x%x/%i).\n",
    + order, gfp_mask, !!(current->flags & PF_MEMALLOC));
    return NULL;
    }

    On the assumption it's an atomic allocation, chould you try this patch and
    see if it reduces the frequency:

    --- ../2.4.9.clean/mm/page_alloc.c Thu Aug 16 12:43:02 2001
    +++ ./mm/page_alloc.c Wed Aug 29 23:47:39 2001
    @@ -493,6 +493,9 @@
    }

    /* XXX: is pages_min/4 a good amount to reserve for this? */
    + if (z->free_pages < z->pages_min / 3 && (gfp_mask & __GFP_WAIT) &&
    + !(current->flags & PF_MEMALLOC))
    + continue;
    if (z->free_pages < z->pages_min / 4 &&
    !(current->flags & PF_MEMALLOC))
    continue;
    -
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