Re: kern/44568 (WAPBL doens't play nice with snapshots)

[Juergen Hannken-Illjes <hannken%eis.cs.tu-bs.de@localhost>]

The following reply was made to PR kern/44568; it has been noted by GNATS.

From: Juergen Hannken-Illjes <hannken%eis.cs.tu-bs.de@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: kern/44568 (WAPBL doens't play nice with snapshots)
Date: Thu, 17 Feb 2011 19:01:01 +0100

 On Thu, Feb 17, 2011 at 05:50:05PM +0000, Manuel Bouyer wrote:
 > The following reply was made to PR kern/44568; it has been noted by GNATS.
 > 
 > From: Manuel Bouyer <bouyer%antioche.eu.org@localhost>
 > To: hannken%NetBSD.org@localhost, netbsd-bugs%NetBSD.org@localhost, 
 > gnats-bugs%NetBSD.org@localhost
 > Cc: 
 > Subject: Re: kern/44568 (WAPBL doens't play nice with snapshots)
 > Date: Thu, 17 Feb 2011 18:06:22 +0100
 > 
 >  On Thu, Feb 17, 2011 at 04:50:05PM +0000, Manuel Bouyer wrote:
 >  >  thanks for your fixes, I couldn't make my test system panic any more.
 >  
 >  Well, I could. At reboot time I got the panic "transaction too big to flush"
 >  again:
 >  wapbl_flush
 >  wapbl_begin
 >  ufs_inactive
 >  VOP_INACTIVE
 >  vrelel
 >  ffs_snapshot_unmount
 >  ffs_flushfiles
 >  ffs_unmount
 
 Please try it with a smaller wl_dealloclim in file vfs_wapbl.c line 482:
 
 -      wl->wl_dealloclim = wl->wl_bufbytes_max / mp->mnt_stat.f_bsize / 2;
 +      wl->wl_dealloclim = wl->wl_bufbytes_max / mp->mnt_stat.f_bsize / 4;
 
 -- 
 Juergen Hannken-Illjes - hannken%eis.cs.tu-bs.de@localhost - TU Braunschweig 
(Germany)