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mention some of the other known severe wapbl problems

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dholland 2016-05-05 06:17:45 +00:00
parent 25d58d24b2
commit 6c5f250fa0
1 changed files with 5 additions and 2 deletions
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@ -1,4 +1,4 @@
$NetBSD: storage,v 1.12 2016/05/01 20:51:36 dholland Exp $
$NetBSD: storage,v 1.13 2016/05/05 06:17:45 dholland Exp $
NetBSD Storage Roadmap
======================
@ -90,7 +90,10 @@ best option at this point is:
+ Fixing WAPBL (e.g. to flush newly allocated/newly written blocks to
disk early) has been examined by several people who know the code base
and judged difficult. Still, it might be the best way forward.
and judged difficult. Also, some other problems have come to light
more recently; e.g. PR 50725, PR 47146, and a problem where truncating
large sparse files takes ~forever. Also see PR 45676. Still, it might
be the best way forward.
+ There is another journaling FFS; the Harvard one done by Margo
Seltzer's group some years back. We have a copy of this, but as it was