Sorry for the late summary.
My original question was:
What's this panic: ufs_putapage: bn == UFS_HOLE mean?
Umesh Vaghela and
Birger A. Wathne
for their help replies.
Kevein Sheehan summarised what it means:
UFS files are allowed to be sparse, which means that if you don't
write to a section, space is not allocated. E.g. if you create
a 0 length file and write byte 0 and byte 1 million, the first
and last blocks are allocated, the ones in between read as zeroes
but have no disk space allocated. Core files are a typical example
of sparse files..
ufs_putapage was asked to put back a page in memory to a file, and
UFS found out that there was no block there, which is clearly a
Bad Thing. Either you have some FS corruption (fsck should find
this) or you need to install patches.
[Kai: I've installed all recommended patches as of March 8. ]
It seems the swap drive is having problems. Soon after the crash I got
several times scsi bus reset errors for all the disk drives when load was
high. iostat -x 30 gave me around 300ms for svc_t to the swap drive, which
used to be 30ms. I've since moved the swap to elsewhere and it seems stable
after several days.
This archive was generated by hypermail 2.1.2 : Fri Sep 28 2001 - 23:11:50 CDT