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- Eliminate bogus page replacement that is inconsistently applied in the invalidation loop in brelse. This has been a no-op in modern times as biodone() is responsible for cleaning up after bogus pages. This would've spammed the console with printfs at a minimum. - Allow the compiler and human readers alike to reason about allocbuf() by splitting it into constituent parts. - Separate the VM manipulating and buf manipulating code in brelse() and bufdone() so that the intentions are clear. This makes it evident that there are several duplicated buf pages loops that will be consolidated at a later time. Reviewed by: kib Tested by: pho Sponsored by: EMC / Isilon Storage Division
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