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authorBrian Behlendorf <[email protected]>2009-02-12 13:32:10 -0800
committerBrian Behlendorf <[email protected]>2009-02-12 13:32:10 -0800
commit37db7d8cf9936e6d2851a4329c11efcd9f61305c (patch)
treef4fe4f3523de9302b80e56d3240a8c6f58f5c0e4 /include/sys/fm
parentf500ccff35a55d04e7f6b8ddb54ff6e54e9c5d70 (diff)
kmem slab fixes
- Default SPL_KMEM_CACHE_DELAY changed to 15 to match Solaris. - Aged out slab checking occurs every SPL_KMEM_CACHE_DELAY / 3. - skc->skc_reap tunable added whichs allows callers of spl_slab_reclaim() to cap the number of slabs reclaimed. On Solaris all eligible slabs are always reclaimed, and this is still the default behavior. However, I suspect that is not always wise for reasons such as in the next comment. - spl_slab_reclaim() added cond_resched() while walking the slab/object free lists. Soft lockups were observed when freeing large numbers of vmalloc'd slabs/objets. - spl_slab_reclaim() 'sks->sks_ref > 0' check changes from incorrect 'break' to 'continue' to ensure all slabs are checked. - spl_cache_age() reworked to avoid a deadlock with do_flush_tlb_all() which occured because we slept waiting for completion in spl_cache_age(). To waiting for magazine reclamation to finish is not required so we no longer wait. - spl_magazine_create() and spl_magazine_destroy() shifted back to using for_each_online_cpu() instead of the spl_on_each_cpu() approach which was of course a bad idea due to memory allocations which Ricardo pointed out.
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