stdin lockup using con0=fd:0,fd:1 (guest 2.4.26-3um)
did i miss the console cleanup crew?
i have a UML guest command line that uses con0=fd:0,fd:1 (or not, as this is the default for CONFIG_CON_ZERO_CHAN)
i launch new xterms using -- xterm -e '<guest cmdline>' & (side note - can lock it w/o this too.) and users leaning on the keyboard (most notably <enter>) while the new xterms pop up and steal the window focus have experienced unresponsive UML prompts.
no further keyboard input is processed...
uml_mconsole <id> reboot and things can be made better. so the UML isn't locked up just the stdin....
i've tried to go thru stdio_init -> open_console -> line_open to see if there was a likely place to drop a 'flush' of stdin before we try attaching 0 -> 1 and 1 -> 0 (line_setup_irq)... but i don't understand it all enough <frown>.
this is redhat 9 + SKAS - NPTL 2.4.20-31 host kernel linux 2.4.26-3um guest kernel.
thank you.
--
db
Quoted 1 line · D. Bahi
did i miss the console cleanup crew?
? Not understood, 2.4 didn't get the big cleanup.
Quoted 5 lines
i have a UML guest command line that uses con0=fd:0,fd:1 (or not, as this is the default for
CONFIG_CON_ZERO_CHAN)i launch new xterms using -- xterm -e '<guest cmdline>' & (side note - can lock it w/o this too.)
Describe the other scenario please...
Quoted 4 lines
and users leaning on
the keyboard (most notably <enter>) while the new xterms pop up and steal the window focus have experienced unresponsive UML prompts.
Hmm, can you exclude this is some X11 problem? I get problems in my Opera browser when a Java applet is started (which makes a Java progress window appear for a while). No, I'm not joking. Please try getting the same thing inside normal consoles, or getting the same thing with xterms and without UML.
Quoted 7 lines
no further keyboard input is processed...
uml_mconsole<id> reboot and things can be made better. so the UML isn't locked up just the stdin....i've tried to go thru
stdio_init->open_console->line_opento see if there was a likely place to drop a 'flush' of stdin
? I don't think stdin is flushable (but I don't understand what you mean, so I could be wrong).
Quoted 1 line
before we try attaching 0 -> 1 and 1 -> 0 (
line_setup_irq)...
Hmm, line_setup_irq makes sure that a IRQ is triggered when a event is received on the fd. That fd is provided by the channel driver (the one in con=xterm/pty/fd).
Quoted 6 lines
but i don't understand it all enough <frown>.
this is redhat 9 + SKAS - NPTL 2.4.20-31 host kernel linux 2.4.26-3um guest kernel.
thank you.
Signature · 17 lines
Paolo Giarrusso, aka Blaisorblade Linux registered user n. 292729 http://www.user-mode-linux.org/~blaisorblade ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ User-mode-linux-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel