Lawrence Manning wrote:
> I thought I understood how the buffer figure from meminfo shows only the
> dcache and that all other block buffering is shown in the cache figure.
> But this morning (after the machine being idle for about 8 hours) I find
> about 40meg in the buffers. Now its back to its usual 4meg. Can someone
> please enlighten me? I tried to follow the code, but got as far as
> atomic_read(&buffermem_pages) in si_meminfo...
>
> Lawrence
>
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Lawrence, I'm not sure how much memory your machine has or what is running
on it but if you had 40M in buffers something did a lot of non-filesystem
IO(like
a "du" command or a bunch or reads from a raw device). Then in order for the
buffers to drop back to 4M you had to run out of memory and shrink_mmap had
to reclaim that 36M from the buffermem.
Larry Woodman
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