Comment 62 for bug 1157643

I have spideroak. #25 and #9 did not resolve it for me.

root@jeeves:~# cat /etc/sysctl.d/*.conf /etc/sysctl.conf | sysctl -e -p -
kernel.printk = 4 4 1 7
net.ipv6.conf.all.use_tempaddr = 2
net.ipv6.conf.default.use_tempaddr = 2
kernel.kptr_restrict = 1
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.all.rp_filter = 1
net.ipv4.tcp_syncookies = 1
kernel.yama.ptrace_scope = 1
vm.mmap_min_addr = 65536
net.core.wmem_max = 1048576
net.core.rmem_max = 1048576
net.core.wmem_default = 1048576
net.core.rmem_default = 1048576
error: "Invalid argument" setting key "net.ipv4.tcp_mem"
net.ipv4.tcp_rmem = 1048576
net.ipv4.tcp_wmem = 1048576
fs.inotify.max_user_watches = 65536

apporc #55 resolved for me

I changed 'net.ipv4.tcp_mem=1048576' to 'net.ipv4.tcp_mem=1048576 87380 6291456', then it's ok. in 30-iscsitarget.conf