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    SubjectRe: [patch 04/10] slab: cache_estimate cleanup
    "Pekka Enberg" <> wrote:
    > From: Steven Rostedt <>
    > This patch cleans up cache_estimate() in mm/slab.c and improves the
    > algorithm from O(n) to O(1). We first calculate the maximum number of
    > objects a slab can hold after struct slab and kmem_bufctl_t for each
    > object has been given enough space. After that, to respect alignment
    > rules, we decrease the number of objects if necessary. As required
    > padding is at most align-1 and memory of obj_size is at least align,
    > it is always enough to decrease number of objects by one.
    > The optimization was originally made by Balbir Singh with more
    > improvements from Steven Rostedt. Manfred Spraul provider further
    > modifications: no loop at all for the off-slab case and added comments
    > to explain the background.
    > ...
    > - size_t wastage = PAGE_SIZE << gfporder;
    > - size_t extra = 0;
    > - size_t base = 0;
    > ...
    > + size_t mgmt_size;
    > + size_t slab_size = PAGE_SIZE << gfporder;

    Can anyone think of a reason for using size_t in there instead of plain old
    unsigned int?
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      Last update: 2006-01-16 03:42    [W:0.021 / U:1.164 seconds]
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