Messages in this thread | | | Date | Tue, 15 May 2007 15:02:40 -0700 (PDT) | From | Christoph Lameter <> | Subject | Re: [PATCH 0/5] make slab gfp fair |
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On Tue, 15 May 2007, Peter Zijlstra wrote:
> How about something like this; it seems to sustain a little stress.
Argh again mods to kmem_cache.
Could we do this with a new slab page flag? F.e. SlabEmergPool.
in alloc_slab() do
if (is_emergency_pool_page(page)) { SetSlabDebug(page); SetSlabEmerg(page); }
So now you can intercept allocs to the SlabEmerg slab in __slab_alloc
debug:
if (SlabEmergPool(page)) { if (mem_no_longer_critical()) { /* Avoid future trapping */ ClearSlabDebug(page); ClearSlabEmergPool(page); } else if (process_not_allowed_this_memory()) { do_something_bad_to_the_caller(); } else { /* Allocation permitted */ } }
....
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