Re: kern/45708: Unable to read big files from large FFSv2 (12TB), ls out of swap

[Bartosz Kuźma <bartosz.kuzma%gmail.com@localhost>]

>  dev = 0xa800, block = 625305256, fs = /mnt
>  panic: blkfree: freeing free frag
>  fatal breakpoint trap in supervisor mode
>  trap type 1 code 0 rip ffffffff8052ace5 cs 8 rflags 246 cr2  0 cpl 0
>  rsp ffff80005175f850
>  Stopped in pid 0.58 (system) at netbsd:breakpoint+0x5:  leave
>  db{1}> trace
>  breakpoint() at netbsd:breakpoint+0x5
>  panic() at netbsd:panic+0x24d
>  ffs_blkfree() at netbsd:ffs_blkfree+0x6d7
>  ffs_wapbl_sync_metadata() at netbsd:ffs_wapbl_sync_metadata+0x66
>  wapbl_flush() at netbsd:wapbl_flush+0x7c
>  ffs_sync() at netbsd:ffs_sync+0x36c
>  VFS_SYNC() at netbsd:VFS_SYNC+0x33
>  sync_fsync() at netbsd:sync_fsync+0x85
>  VOP_FSYNC() at netbsd:VOP_FSYNC+0x71
>  sched_sync() at netbsd:sched_sync+0x15d
>

It looks like for block size bigger than 16384 this problem does not exists.

I've tested the following options:

backup-host# newfs -O 2 -b 32768 dk0
/dev/rdk0: 13346816.0MB (27334279096 sectors) block size 32768,
fragment size 4096
        using 17981 cylinder groups of 742.28MB, 23753 blks, 46848 inodes.
super-block backups (for fsck_ffs -b #) at:
192, 1520384, 3040576, 4560768, 6080960, 7601152, 9121344, 10641536, 12161728,
...............................................................................


and:

backup-host# newfs -O 2 -b 65536 dk0
/dev/rdk0: 13346816.0MB (27334279088 sectors) block size 65536,
fragment size 8192
        using 4079 cylinder groups of 3272.12MB, 52354 blks, 103936 inodes.
super-block backups (for fsck_ffs -b #) at:
256, 6701568, 13402880, 20104192, 26805504, 33506816, 40208128, 46909440,
...............................................................................


and it works good in all problematic cases.

-- 
Pozdrawiam, Bartosz Kuźma.