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List:       freebsd-hackers
Subject:    Recursive case in uma?
From:       "Evan Geller" <thespin () gmail ! com>
Date:       2008-06-30 5:37:45
Message-ID: 4f1862640806292237g4797a9b4y33a2d70a009639b () mail ! gmail ! com
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Hey, I'm writing a small hobby operating system and I'm looking to the UMA
for inspiration. The part I don't understand is the recursive case in
uma_zone_slab(). I'm curious where the memory for vm_map_entries actually
come from if the slabs are all full. It would appear that the null returned
by uma_zone_slab() just carries all the way up and there's a fixed upper
limit of vm_map_entries... or that I don't understand the way the uma works.
Would someone mind clearing this up for me?

Thanks a ton for the help!
Evan
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