On Thursday 10 November 2005 07:43, Sven Köhler wrote: > Hi, > > an UML-guest-kernel 2.6.14 (without any additional patches) is running > on a host with kernel 2.6.12.3-skas3-v8.2 host. > Can anybody explain this error-message to me, Yes, I can.
In short: don't worry, I get it too at times and I must just remove this warning, it was introduced recently (by me) and it's wrong (as I later discovered). > which occur periodically > in the guests log: More that "periodically" it's randomically. On a kernel compile loop with -jN, I used to get that more or less once every hour, but with high variability. Just had no time to proof-check and send all patches I have in my queue. > Badness in handle_page_fault at arch/um/kernel/trap_kern.c:98 > 0f3d3b30: [<08062f04>] handle_page_fault+0x1c4/0x260 > 0f3d3b70: [<08063047>] segv+0xa7/0x2e0 > 0f3d3b90: [<080ba701>] sys_read+0x51/0x80 > 0f3d3bd0: [<08053680>] init_udf_fs+0x30/0x50 > 0f3d3c00: [<08053680>] init_udf_fs+0x30/0x50 > 0f3d3c20: [<08053680>] init_udf_fs+0x30/0x50 > 0f3d3c40: [<08065291>] get_skas_faultinfo+0x51/0xc0 > 0f3d3c60: [<08065358>] handle_segv+0x58/0x60 > 0f3d3c80: [<08065a1d>] userspace+0x1ed/0x220 > 0f3d3cd0: [<08066d94>] force_flush_all_skas+0x44/0x50 > 0f3d3cf0: [<08066621>] fork_handler+0xc1/0xe0 It's an error message I introduced to detect a possible bug; however, I later discovered that under high load this warning can be triggered without a real problem. The problem would be a "100% CPU usage" loop (a process endlessly causing guest page faults) right after the warning, so if you haven't got the problem the warning is a false positive. -- Inform me of my mistakes, so I can keep imitating Homer Simpson's "Doh!". Paolo Giarrusso, aka Blaisorblade (Skype ID "PaoloGiarrusso", ICQ 215621894) http://www.user-mode-linux.org/~blaisorblade ___________________________________ Yahoo! Mail: gratis 1GB per i messaggi e allegati da 10MB http://mail.yahoo.it ------------------------------------------------------- SF.Net email is sponsored by: Tame your development challenges with Apache's Geronimo App Server. Download it for free - -and be entered to win a 42" plasma tv or your very own Sony(tm)PSP. Click here to play: http://sourceforge.net/geronimo.php _______________________________________________ User-mode-linux-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
