On Monday 23 May 2005 18:04, D. Bahi wrote: > any hints for where to look for a fix for this odd crash on shutdown? On shutdown actually? Well, very strange. > i must admit, lately, i've been rather frustrated with the lack of > either maintainance or backporting in the 2.4 UML series. of course > this frustration is mostly because of my lack of ability to move forward > past issues such as these. but also the UML web-site + blaise's + other > patches out there along with all kinds of instructions on combinations > on what to use....
> the mechanisims UML uses, jmps ptrace and the like, are not terribly > familar to generic programmers. Is there a UML: How it Works for > Developers - document somewhere? Not a lot, sadly. are you seeing this frequently? Have you updated to any 2.4.27 patch? There is IIRC a context switching bug fixed in them... On 2.6 there is a recent context switching fix from Bodo Stroesser (after 2.6.11) which I might look for... > or must we be so dedicated that we > browse the mailing list archives and look for explainations piecemeal as > responses to queries (as we've seen recently on the list)? > appoligies for any toes i'm stepping on here - i want to help - i just > need help to get there... Probably the simplest way is to say what regressions currently has UML/2.6, or the reasons you don't use it, so that we can help fixing it. > (gdb) bt > #0 0x08161351 in kill () > #1 0x0817d662 in raise () > #2 0x0816163d in abort () > #3 0x080dac3e in panic_coreonpanic (self=0x81fec3c, unused1=0, > unused2=0x8216d60) at um_arch.c:425 > #4 0x0805e46a in notifier_call_chain (n=0x0, val=0, v=0x8216d60) at > sys.c:148 > #5 0x080533d9 in panic (fmt=0x81d1780 "switch_mm_skas - > PTRACE_SWITCH_MM failed, errno = %d\n") at panic.c:77 This is very strange... can you go to that stack frame and print local vars together with a listing of /proc/<UMLPID>/fd? I suspect a EBADF here... > #6 0x080dbf5a in switch_mm_skas (mm_fd=107) at process.c:353 > #7 0x08050b17 in schedule () at mmu_context.h:29 > #8 0x080d6d6e in cpu_idle () at process_kern.c:206 > #9 0x0805047a in rest_init () at init/main.c:353 > #10 0x080494e6 in start_kernel () at init/main.c:447 > #11 0x080dc437 in start_kernel_proc (unused=0x0) at process_kern.c:179 > #12 0x080d6979 in run_kernel_thread (fn=0x80dc410 <start_kernel_proc>, > arg=0x0, jmp_ptr=0x81fec3c) at process.c:231 > #13 0x080dc162 in new_thread_handler (sig=10) at process_kern.c:72 > #14 <signal handler called> > #15 0x08161351 in kill () > #16 0x08160fe5 in siglongjmp () > #17 0x080dbdc1 in start_idle_thread (stack=0x81f0000, > switch_buf_ptr=0x81f0578, fork_buf_ptr=0x0) at process.c:303 > #18 0x080dc48a in start_uml_skas () at process_kern.c:193 > #19 0x080daae3 in linux_main (argc=19, argv=0x30000000) at um_arch.c:393 > #20 0x08050286 in main (argc=19, argv=0xbfffd0b4, envp=0xbfffd104) at > arch/um/main.c:149 > #21 0x08160d13 in __libc_start_main () > > -- > db -- Paolo Giarrusso, aka Blaisorblade Skype user "PaoloGiarrusso" Linux registered user n. 292729 http://www.user-mode-linux.org/~blaisorblade ___________________________________ Yahoo! Mail: gratis 1GB per i messaggi e allegati da 10MB http://mail.yahoo.it ------------------------------------------------------- This SF.Net email is sponsored by Yahoo. Introducing Yahoo! Search Developer Network - Create apps using Yahoo! Search APIs Find out how you can build Yahoo! directly into your own Applications - visit http://developer.yahoo.net/?fr=offad-ysdn-ostg-q22005 _______________________________________________ User-mode-linux-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
