Hello, On Thu, May 07, 2015 at 04:05:57PM +0200, Peter Zijlstra wrote: > On Thu, May 07, 2015 at 02:54:00PM +0100, Tvrtko Ursulin wrote: > > > > Hi, > > > > 4.1.0-rc2 spews the below warning and disables lockdep for me at boot. > > > > Any ideas? > > > > May 7 11:58:20 skl kernel: [ 6.066696] futex hash table entries: 1024 > > (order: 5, 131072 bytes) > > May 7 11:58:20 skl kernel: [ 6.075774] BUG: key ffff88014973b850 not in > > .data! ... > > May 7 11:58:20 skl kernel: [ 6.188202] [<ffffffff811dc06a>] > > __kernfs_create_file+0x7a/0xf0 > > May 7 11:58:20 skl kernel: [ 6.195069] [<ffffffff811dcb4e>] > > sysfs_add_file_mode_ns+0x16e/0x1b0 > > May 7 11:58:20 skl kernel: [ 6.202346] [<ffffffff811dd92a>] > > internal_create_group+0x19a/0x280 > > May 7 11:58:20 skl kernel: [ 6.209515] [<ffffffff811dda43>] > > sysfs_create_group+0x13/0x20 > > May 7 11:58:20 skl kernel: [ 6.216185] [<ffffffff811dda88>] > > sysfs_create_groups+0x38/0x90 > > May 7 11:58:20 skl kernel: [ 6.222958] [<ffffffff8145c3d6>] > > device_add+0x276/0x5d0 > > May 7 11:58:20 skl kernel: [ 6.229040] [<ffffffff8110a80b>] > > pmu_dev_alloc+0x8b/0xd0 > > May 7 11:58:20 skl kernel: [ 6.242184] [<ffffffff81d44cd9>] > > perf_event_sysfs_init+0x46/0x95 > > May 7 11:58:20 skl kernel: [ 6.256118] [<ffffffff81000352>] > > do_one_initcall+0x122/0x1f0 > > May 7 11:58:20 skl kernel: [ 6.268980] [<ffffffff81d27126>] > > kernel_init_freeable+0x106/0x19a > > May 7 11:58:20 skl kernel: [ 6.288120] [<ffffffff8161a38e>] > > kernel_init+0xe/0xf0 > > May 7 11:58:20 skl kernel: [ 6.294004] [<ffffffff81629e92>] > > ret_from_fork+0x42/0x70 > > May 7 11:58:20 skl kernel: [ 6.306367] ---[ end trace 98f2b03275198a56 > > ]--- > > May 7 11:58:20 skl kernel: [ 6.311703] BUG: key ffff88014973b888 not in > > .data! > > May 7 11:58:20 skl kernel: [ 6.317300] BUG: key ffff88014973b8c0 not in > > .data! > > May 7 11:58:20 skl kernel: [ 6.322895] BUG: key ffff88014973b8f8 not in > > .data! > > May 7 11:58:20 skl kernel: [ 6.329549] HugeTLB registered 2 MB page > > size, pre-allocated 0 pages > > That's in sysfs magic mushroom land, lets Cc people who know about this.
sysfs by default uses lockdep key embedded in attrs. It looks like somebody is making on-heap copies of attrs and using them as the group attrs. What's the offending pmu type? Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
