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I can't seem to enable a swap file in /etc/config/fstab:
config swap
option device /mnt/usbdrive/swapfile
option enabled 1
If I manually enable swap with "swapon /mnt/usbdrive/swapfile" I get my swap space. But I can't get it to autoenable with /etc/config/fstab.
--Dan
(Last edited by DanSF on 18 Sep 2008, 23:51)
Set
option enabled 0to
option enabled 1~ JoW
Thanks, but I tried both values without success. I edited my original post to reflect the value that /etc/init.d/fstab expects.
--Dan
No idea if the fstab implementation supports a swapfile. It's working with a swap partition fine here.
I've formatted a USB pen drive with a swap partition and then created the swap space with:
# opkg install swap-utils
# mkswap /dev/sda2Now the swap partition is prepared for usage. Time to configure /etc/config/swap using UCI CLI:
# uci set fstab.swap@[-1].device=/dev/sda2
# uci set fstab.swap@[-1].enabled=1
# uci commit fstab
# /etc/init.d/fstab restartThis works with latest trunk and a swap partion.
For usage with a swap file do:
# opkg install swap-utils
# dd if=/dev/zero of=/swapfile bs=1024 count=65536 # Create a 64MB swap file at /swapfile
# mkswap /swapfile# uci set fstab.@swap[-1].device=/swapfile
# uci set fstab.@swap[-1].enabled=1
# uci commit fstab
# /etc/init.d/fstab restartUsing a swap file instead of a partion does not work for me. The Kernel just segfaults 
root@OpenWrt:/# swapon /swapfile
<1>BUG: unable to handle kernel NULL pointer dereference at 00000000
IP: [<c0276d0a>] __down+0x4e/0xd4
*pde = 00000000
Oops: 0002 [#1] SMP
Modules linked in: usb_storage via_rhine ehci_hcd uhci_hcd ohci_hcd ath_pci wlan_xauth wlan_wep wlan_tkip wlan_ccmp wlan_acl ath_rate_minstrel ath_hal(P) wlan_scan_sta wlan_scan_ap wlan leds_alix sata_via sd_mod nf_nat_tftp nf_conntrack_tftp nf_nat_irc nf_conntrack_irc nf_nat_ftp nf_conntrack_ftp ipt_TTL xt_MARK ipt_ECN xt_CLASSIFY ipt_ttl xt_time ipt_time xt_tcpmss xt_statistic xt_mark xt_mac xt_length ipt_ecn xt_DSCP xt_dscp ipt_IMQ xt_string xt_layer7 ipt_ipp2p ipt_LOG xt_CHAOS xt_DELUDE xt_TARPIT xt_quota xt_portscan xt_pkttype iptable_raw xt_NOTRACK xt_CONNMARK ipt_recent xt_helper xt_conntrack xt_connmark xt_connbytes aec62xx ext3 jbd nls_utf8 nls_iso8859_15 libata usbcore scsi_mod nls_base
Pid: 1377, comm: swapon Tainted: P (2.6.25.16 #1)
EIP: 0060:[<c0276d0a>] EFLAGS: 00010002 CPU: 0
EIP is at __down+0x4e/0xd4
EAX: cfb589cc EBX: cfb589c0 ECX: 00000000 EDX: cd86fef4
ESI: 00000246 EDI: cfb589c8 EBP: ce61d490 ESP: cd86fee8
DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
Process swapon (pid: 1377, ti=cd86e000 task=ce61d490 task.ti=cd86e000)
Stack: 00000001 ce61d490 c011568e cfb589cc 00000000 cfb589c0 00000000 cfb58a98
00000000 c0276b6b 000000d0 c11af160 c01977ee c11af160 c0139645 c01977d9
cfb58a98 cfb589f0 00000001 cd86e000 c013aeef cfc1c520 cfb58a98 c014bdc2
Call Trace:
[<c011568e>] default_wake_function+0x0/0x8
[<c0276b6b>] __down_failed+0x7/0xc
[<c01977ee>] jffs2_readpage+0x15/0x31
[<c0139645>] read_cache_page_async+0x95/0x11d
[<c01977d9>] jffs2_readpage+0x0/0x31
[<c013aeef>] read_cache_page+0xa/0x3f
[<c014bdc2>] sys_swapon+0x2bc/0x898
[<c01120ed>] do_page_fault+0x202/0x549
[<c0103c22>] syscall_call+0x7/0xb
=======================
Code: c0 ab ab 8d 7b 08 c7 45 00 02 00 00 00 89 f8 e8 6a 01 00 00 83 0c 24 01 89 c6 8d 43 0c 8b 48 04 8d 54 24 0c 89 50 04 89 44 24 0c <89> 11 ff 43 04 89 4c 24 10 8b 43 04 48 90 01 03 0f 98 c0 84 c0
EIP: [<c0276d0a>] __down+0x4e/0xd4 SS:ESP 0068:cd86fee8
---[ end trace c4bb807da6c9f357 ]---
Segmentation faultEDIT: Hmm, interesting. Moving the swap file from my CF card from inside the ALIX.2C2 to a USB pen drive connected on the ALIX the swap file just works fine 
(Last edited by Yanira on 19 Sep 2008, 10:33)
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