Date: Fri, 17 Jan 1997 13:40:47 -0500 (EST) From: Thomas David Rivers <ponds!rivers@dg-rtp.dg.com> To: ponds!freefall.cdrom.com!freebsd-hackers, ponds!eunet.ie!nick Subject: Re: kern/2516: Filesystem trouble in 2.2-BETA_A Message-ID: <199701171840.NAA09747@lakes.water.net>
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> >Description: > > One of the systems in here crashed this morning with an error: > > blkfree: freeing free block > > The partition affected was: > > : Filesystem 1K-blocks Used Avail Capacity Mounted on > : /dev/sd1s1f 794783 488075 266969 65% /var/spool/overview > > : # dmesg | grep ahc3 > : ahc3 <Adaptec 3940 SCSI host adapter> rev 3 int a irq 5 on pci1:5 > : ahc3: aic7870 Wide Channel B, SCSI Id=7, 16 SCBs > : ahc3 waiting for scsi devices to settle > : (ahc3:1:0): "SEAGATE ST32550W 0021" type 0 fixed SCSI 2 > : sd1(ahc3:1:0): Direct-Access 2047MB (4194058 512 byte sectors) > > I don't have the output from the printf statement immediately > preceding this in /sys/ufs/ffs/ffs_alloc.c. > > The firesystem was created with newfs (no special args) last Sunday > (97/01/12) and the machine had been up since then without any > trouble. Well - I'd have to say that this is exactly the type of panic I have experienced with 2.1.0, 2.1.5 and 2.1.5-STABLE. Interestingly enough, my recently installed 2.1.6.1 hasn't (yet) experienced it. I've been trying to determine a consistent reproduction; if you can accomplish this - I'm sure it would go a long way toward fixing this problem. I've been working in ffs_alloc.c - it's not at all obvious to me that the problem is there. I'm not discounting it; but several read-throughs of the code haven't found it. - Dave Rivers -
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