Hi,
I tried to install 1.6_BETA2 on a SS1+, but the install paniced while
downloading the sets.
The machine has 64M RAM. I booted from miniroot, and started an
install using existing disklabel. Then I selected a ftp install from a local
server. The installer was downloading base.tgz at more than 500KB/s when
it paniced this way. It's perfectly reproductible for me (tried 2 times).
The machine has 64M RAM.

Here's a cut'n'paste from the console:
229 Entering Extended Passive Mode (|||62498|)
150 Opening BINARY mode data connection for 'base.tgz' (20025278 bytes).
 78% |****************************         | 15347 KB  510.36 KB/s    00:08 ETApanic: me_alloc: all pmegs gone
syncing disks... panic: lockmgr: locking against myself
Frame pointer is at 0xf2f553b8
Call traceback:
  pc = 0xf024caf0  args = (0x0, 0xfe5, 0x0, 0x0, 0xf2f554d0, 0x0, 0xf2f55420) fp = 0xf2f55420
  pc = 0xf0118aac  args = (0x104, 0x0, 0xfe012000, 0xf030f000, 0xf00d7740, 0x0, 0xf2f55488) fp = 0xf2f55488
  pc = 0xf0107a30  args = (0xf0292d08, 0xf030f000, 0xf030f000, 0x104, 0xf0143dc4, 0x13, 0xf2f554f0) fp = 0xf2f554f0
  pc = 0xf0141f84  args = (0xf2f70bcc, 0x2, 0xf2f70b60, 0xf02df000, 0xf2f55900, 0x0, 0xf2f55558) fp = 0xf2f55558
  pc = 0xf0140da4  args = (0xf2f55620, 0x7c, 0xf0141f74, 0xf043f200, 0x1866, 0x2, 0xf2f555c0) fp = 0xf2f555c0
  pc = 0xf0140564  args = (0xf2f70b60, 0x10012, 0x3f30, 0xf1aabf30, 0xf1aa8000, 0x19, 0xf2f55638) fp = 0xf2f55638
  pc = 0xf01392d4  args = (0xf2f70b60, 0x10012, 0xf01075a8, 0xf2745760, 0x0, 0xb98c0, 0xf2f556a0) fp = 0xf2f556a0
  pc = 0xf00d77f8  args = (0xf2f70b60, 0x10012, 0xf02d856c, 0xf030cd98, 0xf1aa8000, 0x100, 0xf2f55708) fp = 0xf2f55708
  pc = 0xf013bdfc  args = (0xf04df200, 0x2, 0xf0446f00, 0xf2745760, 0xf00d7740, 0x0, 0xf2f55778) fp = 0xf2f55778
  pc = 0xf013ad08  args = (0xf2745760, 0x0, 0x0, 0xd, 0xf0143dc4, 0x13, 0xf2f557e0) fp = 0xf2f557e0
  pc = 0xf024caa8  args = (0xf0002000, 0xf2745760, 0xf0002000, 0xf02df000, 0xf2f55900, 0x0, 0xf2f55850) fp = 0xf2f55850
  pc = 0xf0118aac  args = (0x100, 0x0, 0xfe012000, 0xf030f000, 0xf04438b8, 0x2, 0xf2f558b8) fp = 0xf2f558b8
  pc = 0xf025100c  args = (0xf02b6b78, 0xf030f000, 0xf030f000, 0x100, 0xf1e49000, 0x2000, 0xf2f55920) fp = 0xf2f55920
  pc = 0xf0257440  args = (0xf0320e48, 0xf0321028, 0xf1, 0xc, 0x0, 0x0, 0xf2f55998) fp = 0xf2f55998
  pc = 0xf01fa4f0  args = (0xf1300000, 0xf031f07c, 0xf0320f74, 0xf02572bc, 0x0, 0x0, 0xf2f55a00) fp = 0xf2f55a00
  pc = 0xf0143e90  args = (0xf2f55b70, 0xf1300000, 0x1, 0xf2f55af8, 0x0, 0x10000, 0xf2f55a78) fp = 0xf2f55a78
  pc = 0xf0143ac8  args = (0xf2f70b60, 0xf2f55b68, 0x10, 0xd, 0xf0143dc4, 0x13, 0xf2f55b08) fp = 0xf2f55b08
  pc = 0xf00d9724  args = (0xf031e0e8, 0xf2f55b68, 0x0, 0x0, 0x1, 0x1, 0xf2f55c58) fp = 0xf2f55c58
  pc = 0xf0141214  args = (0xf2f55d20, 0xf00d9624, 0x0, 0x0, 0x0, 0x0, 0xf2f55cc0) fp = 0xf2f55cc0
  pc = 0xf00d9284  args = (0xf2f70b60, 0x0, 0x0, 0x0, 0x0, 0x11, 0xf2f55d48) fp = 0xf2f55d48
  pc = 0xf00d8f40  args = (0xf2f55eb0, 0x0, 0xf0141f74, 0xf043f200, 0xf2f71758, 0xf2f78d30, 0xf2f55db0) fp = 0xf2f55db0
  pc = 0xf0140a70  args = (0xf2f55eb0, 0xf00d8ef8, 0x48, 0xf043f200, 0x0, 0x0, 0xf2f55e50) fp = 0xf2f55e50
  pc = 0xf0146b98  args = (0xf2f70b60, 0xf0446f00, 0x8, 0x0, 0x0, 0x0, 0xf2f55ee0) fp = 0xf2f55ee0
  pc = 0xf0009f58  args = (0xf02d8400, 0xf02d8400, 0xf02d3400, 0xf0296800, 0xf02d6000, 0xf02ee400, 0xf2f55f50) fp = 0xf2f55f50
  pc = 0x0  args = (0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0) fp = 0x0

dump to dev 7,1 not possible
rebooting

-- 
Manuel Bouyer <bouyer@antioche.eu.org>
--