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Date:      Thu, 7 Oct 1999 23:04:37 +0200 (CEST)
From:      Andrzej Bialecki <abial@webgiro.com>
To:        Matthew Dillon <dillon@apollo.backplane.com>
Cc:        freebsd-hackers@FreeBSD.ORG
Subject:   Re: Non-standard FFS parameters
Message-ID:  <Pine.BSF.4.05.9910072301530.39149-100000@freja.webgiro.com>
In-Reply-To: <199910071729.KAA95735@apollo.backplane.com>

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On Thu, 7 Oct 1999, Matthew Dillon wrote:

> 
> :
> :Running bonnie on the filesystem with these parameters results in
> :unkillable process sitting in getblk (it's the first phase of bonnie test
> :when they use putc() to create the file). It just sits there and doesn't
> :consume CPU. The OS is 3.3-R.
> :
> :Andrzej Bialecki
> 
>     Hmmm.  It's quite possible, 3.x's getnewbuf() code is pretty nasty.  I
>     have a solution under test for 4.x (current).  There simply may not be
>     anything that can be done for 3.x short of porting current's getnewbuf()
>     code over, and doing so has been deemed too risky by DG due to all the
>     collateral porting that would also have to be done.  I agree with that
>     assessment, plus it's a huge amount of work that I don't have time to do
>     at this late date.
> 
>     Try using a smaller block size, like 16K.  If that doesn't work then just
>     stick with 8K I guess.  The kernel's clustering code should still make it
>     reasonably efficient.

Yeah, I guess that's the only way to do it on 3.x... But how can I speed
up fsck then, since newfs will create millions of inodes I don't need
which will cause fsck to run for ages...

Andrzej Bialecki

//  <abial@webgiro.com> WebGiro AB, Sweden (http://www.webgiro.com)
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