Re: hammer_alloc_data panic

["Simon 'corecode' Schubert" <corecode@xxxxxxxxxxxx>]

Matthew Dillon wrote:
> :We absolutely need this.  People will complain left and right if it 
> :isn't "just" working.
> :
> :Probably I'm missing something, but can't we reserve N blocks for 
> :reblocking purposes, so that the reblocker always can make progress?
>     Yes, but if the filesystem has 60% fragmentation we are talking close
>     to a gigabyte needing to be reserved (from my testing with Gergo's
>     wonderfully fragmented 14G filesystem).  That clearly will not work very
>     well for small filesystems.

Why do you need to reserve 1GB?  Wouldn't (in theory), one block be 
enough to be able to make progress?

cheers
  simon