06089b9e19
The Linux direct reclaim path uses this out of band value to determine if forward progress is being made. Normally this is incremented by kmem_freepages() which is part of the various Linux slab implementations. However, since we are using none of that infrastructure we're responsible for incrementing this count. If no forward progress is detected and a subsequent allocation fails the OOM killer will be invoked. If there was forward progress additional reclaim will be attempted via the page cache and registerd shrinker until the allocation succeeds. Signed-off-by: Prakash Surya <surya1@llnl.gov> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #107 |
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