Philippe Gerum wrote: > On Wed, 2006-11-15 at 23:36 +0100, Jan Kiszka wrote: >> Philippe Gerum wrote: >>> On Wed, 2006-11-15 at 22:01 +0100, Jan Kiszka wrote: >>> >>>> /me unfortunately failed to reproduce your problem here. Instead, I >>>> found a regression in SVN head - different story for a different thread. >>>> >>> It's reproducible here. This bug triggers if you leave enough time >>> between queue creation and deletion for Linux to deal with its usual >>> business, like running workqueues... Additionally, this bug would not >>> trigger with different queue names passed to the creation routines. It >>> seems to be caused by out-of-sequence create/delete requests of /proc >>> entries relayed to the proc_fs subsystem, which does not perform any >>> sanity checks on the data it is submitted. >>> >> Yes, that delay makes the difference. I just added a huge one (100 >> ticks), and now I get tones of this: >> >>> xenomai 2.2.4 timer-test >>> task shadow:0 >>> timer set mode:0 >>> task sleep:0 >>> testing XENOMAI q-functions >>> Bad page state in process 'maintask' >>> page:c10e8b20 flags:0x80000400 mapping:00000000 mapcount:0 count:0 >>> Trying to fix it up, but a reboot is needed >>> Backtrace: >>> <c0103055> show_trace+0x12/0x14 <c01035e0> dump_stack+0x1c/0x1e >>> <c0157104> bad_page+0x49/0x73 <c01577d8> free_hot_cold_page+0x68/0x13d >>> <c01578fb> free_hot_page+0xf/0x11 <c0157a17> __free_pages+0x2e/0x39 >>> <c01646f2> __vunmap+0x90/0xbc <c01647c4> vfree+0x2e/0x30 >>> <c01388ca> xnheap_destroy_mapped+0xe2/0x11b <c8887d93> >>> rt_queue_delete+0xb5/0xf2 [xeno_native] >>> <c88836d9> __rt_queue_delete+0x4e/0x72 [xeno_native] <c0141b20> >>> losyscall_event+0xa3/0x145 >>> <c013594f> __ipipe_dispatch_event+0xac/0x16c <c0109fd2> >>> __ipipe_syscall_root+0x78/0x100 >>> <c02a5520> system_call+0x20/0x38 >> Is this also what you see? Looks quite different on first sight. [Note: >> it's on a qemu box.] >> > > Uh, no. Try removing the second part of your heap patch, regarding the > memory unreservation routine. >
Ouch, that part of my patch was nonsense, indeed. Fine again now. Jan
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