System has insufficient buffers to rebalance the tree
srussell at prodigeinfo.com
Sun May 15 06:50:17 PDT 2011
I have the same problem, I've just converted my data volume to a HAMMER
file system on my server. I receive this message:
«hammer: System has insufficient buffers to rebalance the tree. nbuf <
I have 512MB of SDRAM on it. I guess it's time for me to upgrade this :-)
Le 2011-01-31 16:17, Matthew Dillon a écrit :
> :On Sunday 30 January 2011 22:43:01 Matthew Dillon wrote:
> :> :I still get this warning. Is it ever going to be fixed?
> :> :
> :> :Pierre
> :> I could remove the kprintf I guess and have it just reported by
> :> hammer cleanup.
> :Is the number of buffers something I can change, or is it determined by the
> :kernel based on memory size?
> It's based on memory size and while it is possible to change it the
> problem is that your system doesn't have enough memory for what the
> hammer rebalance code really needs to operate.
> Part of this is that the rebalance algorithm simply requires a huge number
> of concurrent buffers. Ultimately the fix would be to change the algorithm
> but it isn't easy to reformulate and I don't really want to break it open
> because one mistake in that code could blow up the filesystem.
> Matthew Dillon
> <dillon at backplane.com>
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