My original intent was to get unionfs working on CentOS 5.1 (using kernel 2.6.18-53.el5)
I tried using the RHEL5 patch here: http://download.filesystems.org/unionfs/stable/unionfs-2.4_for_2.6.18-RHEL5.diff.gz I had to make some modifications to the patch and I got it compiling with the 53 version of the kernel but I kept getting a kernel oops. I then tried to get the configuration as close to the one that Dave had in this posting: http://www.mail-archive.com/unionfs@mail.fsl.cs.sunysb.edu/msg02959.html I didn’t have the source rpm he had, I pulled the Red Hat 5.1 kernel-2.6.18-92.1.6.el5 and I had to make a couple kabi check modifications to get the spec file to work. I followed Dave’s advice (in the thread above) and added the following to my spec file: for i in *.config; do echo "CONFIG_UNION_FS=m" >> $i echo "CONFIG_UNION_FS_XATTR=y" >> $i echo "CONFIG_UNION_FS_DEBUG=y" >> $i done Except in other threads Erez suggested to turn CONFIG_UNION_FS_XATTR off because it isn’t compatible with RHEL. So I set it to “n” instead. I was able to get it to compile with the unionfs-2.4_for_2.6.18-RHEL5 patch with no modifications at all. But I get another kernel oops: root (hd0,0) Filesystem type is ext2fs, partition type 0x83 kernel /boot/vmlinuz ro root=LABEL=/ console=ttyS0,115200 single quiet [Linux-bzImage, setup=0x1e00, size=0x1b80e4] initrd /boot/initrd.img [Linux-initrd @ 0xfc88000, 0x257c44 bytes] Memory for crash kernel (0x0 to 0x0) notwithin permissible range ------------[ cut here ]------------ kernel BUG at include/linux/dcache.h:323! invalid opcode: 0000 [#1] SMP last sysfs file: Modules linked in: CPU: 0 EIP: 0060:[<c047ec91>] Not tainted VLI EFLAGS: 00010246 (2.6.18-92.1.6.el5 #1) EIP is at do_path_lookup+0x120/0x2a5 eax: 00000000 ebx: 00000310 ecx: 00000110 edx: c127992c esi: c1279910 edi: ffffffe9 ebp: c1279910 esp: c1279884 ds: 007b es: 007b ss: 0068 Process swapper (pid: 1, ti=c1279000 task=c1278aa0 task.ti=c1279000) Stack: cf129000 c0472361 00000310 c1279910 ffffffe9 cf129000 c047f655c1279910 ffffff9c ffffff9c c1279910 ffffff9c c1279910 c047f7f7 c1279910 00000242 000081c0 c1279910 ffffff9c 00000242 cf129000 00000002 cf129000 c1279910 Call Trace: [<c0472361>] get_empty_filp+0x99/0x164 [<c047f655>] __path_lookup_intent_open+0x42/0x72 [<c047f7f7>] open_namei+0x9a/0x602 [<c046fe9f>] do_filp_open+0x1c/0x31 [<c0488bca>] mntput_no_expire+0x13/0x6c [<c046feef>] do_sys_open+0x3b/0xaf [<c046ff90>] sys_open+0x16/0x18 [<c06ee63f>] do_name+0xc2/0x1bb [<c06ed8c7>] write_buffer+0x1a/0x28 [<c06ed936>] flush_window+0x61/0xaf [<c06edad0>] inflate_codes+0x14c/0x3d9 [<c06ef0f1>] inflate_dynamic+0x520/0x556 [<c06ef5f5>] unpack_to_rootfs+0x4ce/0x8e0 [<c06ef9fa>] unpack_to_rootfs+0x8d3/0x8e0 [<c04269f2>] printk+0x19/0xa0 [<c06efa7a>] populate_rootfs+0x73/0xc1 [<c06ea55b>] init+0x12b/0x24c [<c0404e0a>] ret_from_fork+0x6/0x1c [<c06ea430>] init+0x0/0x24c [<c06ea430>] init+0x0/0x24c [<c0405c57>] kernel_thread_helper+0x7/0x10 ======================= Code: 80 40 04 00 00 8b 50 0c eb 7c 80 e5 01 74 2c 8b 45 04 85 c0 74 04 f0 ff 40 28 8b 55 00 85 d2 0f 84 08 01 00 00 8b 02 85 c0 75 08 <0f> 0b 43 01 1b a4 62 c0 f0 ff 02 e9 f2 00 00 00 83 f8 9c 75 73 EIP: [<c047ec91>] do_path_lookup+0x120/0x2a5 SS:ESP 0068:c1279884 <0>Kernel panic - not syncing: Fatal exception I see the main possible difference is my kernel version may be different because I was just using the stock kernel.. I am not sure what Dave was using. I wasn’t getting a kernel oops when I took out unionfs. Does anyone have any ideas? Thanks! Theresa _______________________________________________ unionfs mailing list: http://unionfs.filesystems.org/ unionfs@mail.fsl.cs.sunysb.edu http://www.fsl.cs.sunysb.edu/mailman/listinfo/unionfs
