The current installer for NSLU2 available via http://www.slug-firmware.net (debian-etch-rc1-20061102.zip and debian-4.0r2.zip) seems to repeatedly close SSH during installation, causing the install to restart.
The simplest cause of this is the configuration of the ssh client used to connect to the NSLU2 (slug) in question. See Debian bug 458154 for details and discussion. In summary, you may be able to get away with adding the following to your
Otherwise this may be a symptom of the NSLU2 running out of available memory. When a process grows too much, the OOM (Out Of Memory) killer of the kernel kills it, and its parents. The OOM killer is controlled with /proc/sys/vm/overcommit_memory and /proc/sys/vm/overcommit_ratio. A given process can be made immune to the OOM killer with echo OOM_DISABLE > /proc/<pid>/oom_adj. Although it is interesting to know about the OOM killer, there is no report that tweaking it solves the problem.
A solution to this is to:
Resizing the SSH terminal screen will also cause a disconnect; don't do that. Attempting to format very large partitions also creates this problem, but the workaround does not help. Try to make the primary partition smaller. This will allow the installer to run in the normal fashion.
Note by Chris S: I got it to work on a 500GB partition by using "modprobe -r" to unload the fat and vfat drivers (lsmod to view the modules loaded). They're a waste of memory if you aren't installing to a FAT partition. Also use "modprobe -r" to unload the ixp4xx_beeper driver to save a little more RAM. Then hit <Go Back> on the partitioner to have it close the partitioner and return to the installer menu (this also saves memory). All told, I had over 11MB of free ram when I entered the mke2fs command. FYI, when creating the partitions DO NOT USE sector 0. Fdisk will let you use it, but when you reboot your drive will be useless until you are able to recover the boot sector. -- reply J.S: only had about 9.8mb free ram on trying this - still crashes. linux pc formatting using mke2fs isnt detected by the slug :(
So it seems that it is the formatting of the root / primary partition that causes the memory crash, rather than the formatting of the swap space.
An alternate solution is to:
Note by Loic Dachary: the instructions suggesting to add swap prior to running mke2fs on a large partition succeeded on one NSLU2 and always fails on another one. I'm stuck with it:
~ # cat /proc/swaps Filename Type Size Used Priority ~ # mkswap /dev/sda1 Setting up swapspace version 1, size = 515682304 bytes ~ # swapon /dev/sda1 ~ # mke2fs -j /dev/sda2 mke2fs 1.40-WIP (14-Nov-2006) Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) 921120 inodes, 1839516 blocks 91975 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=1887436800 57 block groups 32768 blocks per group, 32768 fragments per group 16160 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632 Writing inode tables: Connection to 192.168.1.130 closed by remote host. Connection to 192.168.1.130 closed. (reconnect) ~ # cat /proc/meminfo MemTotal: 29988 kB MemFree: 9676 kB Buffers: 0 kB Cached: 10956 kB SwapCached: 2528 kB Active: 9020 kB Inactive: 6380 kB HighTotal: 0 kB HighFree: 0 kB LowTotal: 29988 kB LowFree: 9676 kB SwapTotal: 503592 kB SwapFree: 501064 kB Dirty: 0 kB Writeback: 0 kB AnonPages: 2096 kB Mapped: 2300 kB Slab: 2448 kB PageTables: 276 kB NFS_Unstable: 0 kB Bounce: 0 kB CommitLimit: 518584 kB Committed_AS: 8392 kB VmallocTotal: 991232 kB VmallocUsed: 17084 kB VmallocChunk: 966652 kB ~ # cat /proc/swaps Filename Type Size Used Priority /dev/scsi/host0/bus0/target0/lun0/part1 partition 503592 2528 -1 ~ # cat /proc/sys/vm/overcommit_memory 0 ~ # cat /proc/sys/vm/overcommit_ratio 50 ~ # dmesg Adding 503608k swap on /dev/sda2. Priority:-2 extents:1 across:503608k oom-killer: gfp_mask=0x200d0, order=0 Mem-info: DMA per-cpu: cpu 0 hot: high 6, batch 1 used:0 cpu 0 cold: high 2, batch 1 used:1 DMA32 per-cpu: empty Normal per-cpu: empty HighMem per-cpu: empty Free pages: 1076kB (0kB HighMem) Active:1876 inactive:4012 dirty:3 writeback:3138 unstable:0 free:269 slab:725 mapped:63 pagetables:69 DMA free:1076kB min:724kB low:904kB high:1084kB active:7504kB inactive:16048kB present:32768kB pages_scanned:1376 all_unreclaimable? no lowmem_reserve: 0 0 0 0 DMA32 free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no lowmem_reserve: 0 0 0 0 Normal free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no lowmem_reserve: 0 0 0 0 HighMem free:0kB min:128kB low:128kB high:128kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no lowmem_reserve: 0 0 0 0 DMA: 25*4kB 2*8kB 2*16kB 1*32kB 4*64kB 1*128kB 0*256kB 1*512kB 0*1024kB 0*2048kB 0*4096kB = 1076kB DMA32: empty Normal: empty HighMem: empty Swap cache: add 2193, delete 2171, find 546/561, race 0+0 Free swap = 499188kB Total swap = 503608kB Free swap: 499188kB 8192 pages of RAM 376 free pages 712 reserved pages 725 slab pages 3192 pages shared 22 pages swap cached Out of Memory: Kill process 2176 (sshd) score 74 and children. Out of memory: Killed process 6189 (sshd).