After searching a bit more, especially after realizing it's not 2.6.37+ but 2.6.38+ (so I corrected $subject), I found a few references to this, especially https://bugzilla.redhat.com/show_bug.cgi?id=719607 and a few more (most of which are without answers).
I tested the patch proposed in RH#719607 (attachtment #512209) - it restores functionality of automounter, at least as far as I can see. I think it should go to -stable, too... ;) Thanks, /mjt 15.08.2011 23:38, Michael Tokarev wrote: > Hello. > > I found out that since 2.6.37 kernel, my automount (neither > debian version 5.0.4-3.2 nor the latest 5.0.6) does not work > anymore. > > Automounter starts correctly, mounts - say - /misc, and stays > there listening for events. > > But the problem is that no events gets delivered to it no > matter how I try. Accesses to /misc/foo always returns > immediately with ENOENT error, and automount (all threads > of it) is sleeping without any activity whatsoever. > > I tried to bisect this issue, but faced some problems -- > most kernels around the bad commit OOPSes while accessing > /misc/foo. Here's the bisect log: > > # good: [22763c5cf3690a681551162c15d34d935308c8d7] Linux 2.6.32 > git bisect good 22763c5cf3690a681551162c15d34d935308c8d7 > # bad: [521cb40b0c44418a4fd36dc633f575813d59a43d] Linux 2.6.38 > git bisect bad 521cb40b0c44418a4fd36dc633f575813d59a43d > # skip: [b7ab39f631f505edc2bbdb86620d5493f995c9da] fs: dcache scale dentry > refcount > git bisect skip b7ab39f631f505edc2bbdb86620d5493f995c9da > # good: [cb4b492ac7595aad10756fe0b04691f0965e0cfc] autofs4: rename dentry to > expiring in autofs4_lookup_expiring() > git bisect good cb4b492ac7595aad10756fe0b04691f0965e0cfc > # good: [5f57cbcc02cf18f6b22ef4066bb10afeb8f930ff] fs: dcache remove d_mounted > git bisect good 5f57cbcc02cf18f6b22ef4066bb10afeb8f930ff > # skip: [ab90911ff90cdab59b31c045c3f0ae480d14f29d] Allow d_manage() to be > used in RCU-walk mode > git bisect skip ab90911ff90cdab59b31c045c3f0ae480d14f29d > # skip: [cc53ce53c86924bfe98a12ea20b7465038a08792] Add a dentry op to allow > processes to be held during pathwalk transit > git bisect skip cc53ce53c86924bfe98a12ea20b7465038a08792 > # skip: [6651149371b842715906311b4631b8489cebf7e8] autofs4: Clean up > autofs4_free_ino() > git bisect skip 6651149371b842715906311b4631b8489cebf7e8 > # bad: [726a5e0688fd344110d8f2979d87f243a4ba1a48] autofs4: > autofs4_get_inode() doesn't need autofs_info * argument anymore > git bisect bad 726a5e0688fd344110d8f2979d87f243a4ba1a48 > # skip: [9e3fea16ba386fa549a0b2de8a203e5d412997a0] autofs4: Fix wait > validation > git bisect skip 9e3fea16ba386fa549a0b2de8a203e5d412997a0 > # bad: [14a2f00bde7668fe18d1c8355d26c7c96961e1f7] autofs4: autofs4_mkroot() > is not different from autofs4_init_ino() > git bisect bad 14a2f00bde7668fe18d1c8355d26c7c96961e1f7 > # skip: [71e469db242c2eeb00faf9caf7d9e00150c00a6e] autofs4: Clean up dentry > operations > git bisect skip 71e469db242c2eeb00faf9caf7d9e00150c00a6e > # bad: [c14cc63a63e94d490ac6517a555113c30d420db4] autofs4 - fix > get_next_positive_dentry() > git bisect bad c14cc63a63e94d490ac6517a555113c30d420db4 > # skip: [e61da20a50d21725ff27571a6dff9468e4fb7146] autofs4: Clean up inode > operations > git bisect skip e61da20a50d21725ff27571a6dff9468e4fb7146 > # skip: [dd89f90d2deb9aa5bc8e1b15d726ff5c0bb2b623] autofs4: Add v4 pseudo > direct mount support > git bisect skip dd89f90d2deb9aa5bc8e1b15d726ff5c0bb2b623 > # skip: [8c13a676d5a56495c350f3141824a5ef6c6b4606] autofs4: Remove unused code > git bisect skip 8c13a676d5a56495c350f3141824a5ef6c6b4606 > # bad: [b650c858c26bd9ba29ebc82d30f09355845a294a] autofs4: Merge the > remaining dentry ops tables > git bisect bad b650c858c26bd9ba29ebc82d30f09355845a294a > # skip: [b5b801779d59165c4ecf1009009109545bd1f642] autofs4: Add d_manage() > dentry operation > git bisect skip b5b801779d59165c4ecf1009009109545bd1f642 > # skip: [b5b801779d59165c4ecf1009009109545bd1f642] autofs4: Add d_manage() > dentry operation > git bisect skip b5b801779d59165c4ecf1009009109545bd1f642 > # skip: [b5b801779d59165c4ecf1009009109545bd1f642] autofs4: Add d_manage() > dentry operation > git bisect skip b5b801779d59165c4ecf1009009109545bd1f642 > > Kernel b5b801779d59165c4ecf1009009109545bd1f642 shows this OOPS: > > [ 11.700752] ------------[ cut here ]------------ > [ 11.703371] kernel BUG at fs/dcache.c:1304! > [ 11.703371] invalid opcode: 0000 [#1] SMP > [ 11.703371] last sysfs file: /sys/devices/virtual/vc/vcsa6/dev > [ 11.703371] CPU 0 > [ 11.703371] Modules linked in: ext4 mbcache jbd2 crc16 virtio_net > virtio_pci virtio_blk virtio virtio_ring nfs lockd nfs_acl auth_rpcgss sunrpc > autofs4 > [ 11.703371] > [ 11.703371] Pid: 599, comm: automount Not tainted 2.6.37+ #36 /Bochs > [ 11.703371] RIP: 0010:[<ffffffff810c290c>] [<ffffffff810c290c>] > d_set_d_op+0x4c/0x60 > [ 11.703371] RSP: 0018:ffff88000794be70 EFLAGS: 00010286 > [ 11.703371] RAX: ffff8800070d7380 RBX: ffff88000794fe00 RCX: > 000000000000000e > [ 11.703371] RDX: 0000000000000000 RSI: ffffffffa0004500 RDI: > ffff8800070ea080 > [ 11.703371] RBP: ffff8800070ea080 R08: 0000000000000002 R09: > 0000000000000000 > [ 11.703371] R10: ffff88000794bdc8 R11: 0000000000000001 R12: > ffff8800070056f0 > [ 11.703371] R13: ffff88000719b090 R14: ffff880006d8b840 R15: > 0000000000000000 > [ 11.703371] FS: 0000000000000000(0000) GS:ffff880007c00000(0063) > knlGS:00000000f6d00b70 > [ 11.703371] CS: 0010 DS: 002b ES: 002b CR0: 000000008005003b > [ 11.703371] CR2: 00000000f6bff000 CR3: 0000000007be1000 CR4: > 00000000000006b0 > [ 11.703371] DR0: 0000000000000000 DR1: 0000000000000000 DR2: > 0000000000000000 > [ 11.703371] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: > 0000000000000400 > [ 11.703371] Process automount (pid: 599, threadinfo ffff88000794a000, task > ffff880006860290) > [ 11.703371] Stack: > [ 11.703371] ffffffffa000124a 00000000f6cfa8ac 000000000000016d > ffff8800070ea080 > [ 11.703371] 0000000000000000 0000000000000000 ffffffff810bdcf3 > ffff880006e986c0 > [ 11.703371] ffff8800070d7380 000000051192d652 ffff880007901006 > 0000000000000000 > [ 11.703371] Call Trace: > [ 11.703371] [<ffffffffa000124a>] ? autofs4_dir_mkdir+0x1ba/0x1e0 [autofs4] > [ 11.703371] [<ffffffff810bdcf3>] ? sys_mkdirat+0x113/0x130 > [ 11.703371] [<ffffffff8102787c>] ? cstar_dispatch+0x7/0x32 > [ 11.703371] Code: 10 00 00 48 83 7e 10 00 74 06 81 0f 00 20 00 00 48 83 3e > 00 74 06 81 0f 00 40 00 00 48 83 7e 18 00 74 06 81 0f 00 80 00 00 f3 c3 <0f> > 0b eb fe 0f 0b eb fe 66 66 66 2e 0f 1f 84 00 00 00 00 00 48 > [ 11.703371] RIP [<ffffffff810c290c>] d_set_d_op+0x4c/0x60 > [ 11.703371] RSP <ffff88000794be70> > [ 11.754054] ---[ end trace 1c0705f21da3ac3a ]--- > > As far as I can see, there are users who successfully used autofs > with kernels >= 2.6.37, so I'm really curious how they did that. > No kernel since 2.6.37 and up to current 3.0 works for me. > > Any hints? > > Thank you! > > /mjt _______________________________________________ autofs mailing list autofs@linux.kernel.org http://linux.kernel.org/mailman/listinfo/autofs
