Searched hist:183922 (Results 1 - 3 of 3) sorted by relevance
| /freebsd-11-stable/share/man/man4/ | ||
| H A D | ddb.4 | diff 183922 Wed Oct 15 15:13:00 MDT 2008 ed Import some improvements to the TTY code from the MPSAFE TTY branch. - Change the ddb(4) commands to be more useful (by thompsa@): - `show ttys' is now called `show all ttys'. This command will now also display the address where the TTY data structure resides. - Add `show tty <addr>', which dumps the TTY in a readable form. - Place an upper bound on the TTY buffer sizes. Some drivers do not want to care about baud rates. Protect these drivers by preventing the TTY buffers from getting enormous. Right now we'll just clamp it to 64K, which is pretty high, taking into account that these buffers are only used by the built-in discipline. - Only call ttydev_leave() when needed. Back in April/May the TTY reference counting mechanism was a little different, which required us to call ttydev_leave() each time we finished a cdev operation. Nowadays we only need to call ttydev_leave() when we really mark it as being closed. - Improve return codes of read() and write() on TTY device nodes. - Make sure we really wake up all blocked threads when the driver calls tty_rel_gone(). There were some possible code paths where we didn't properly wake up any readers/writers. - Add extra assertions to prevent sleeping on a TTY that has been abandoned by the driver. - Use ttydev_cdevsw as a more reliable method to figure out whether a device node is a real TTY device node. Obtained from: //depot/projects/mpsafetty/... Reviewed by: thompsa |
| /freebsd-11-stable/sys/sys/ | ||
| H A D | tty.h | diff 183922 Wed Oct 15 15:13:00 MDT 2008 ed Import some improvements to the TTY code from the MPSAFE TTY branch. - Change the ddb(4) commands to be more useful (by thompsa@): - `show ttys' is now called `show all ttys'. This command will now also display the address where the TTY data structure resides. - Add `show tty <addr>', which dumps the TTY in a readable form. - Place an upper bound on the TTY buffer sizes. Some drivers do not want to care about baud rates. Protect these drivers by preventing the TTY buffers from getting enormous. Right now we'll just clamp it to 64K, which is pretty high, taking into account that these buffers are only used by the built-in discipline. - Only call ttydev_leave() when needed. Back in April/May the TTY reference counting mechanism was a little different, which required us to call ttydev_leave() each time we finished a cdev operation. Nowadays we only need to call ttydev_leave() when we really mark it as being closed. - Improve return codes of read() and write() on TTY device nodes. - Make sure we really wake up all blocked threads when the driver calls tty_rel_gone(). There were some possible code paths where we didn't properly wake up any readers/writers. - Add extra assertions to prevent sleeping on a TTY that has been abandoned by the driver. - Use ttydev_cdevsw as a more reliable method to figure out whether a device node is a real TTY device node. Obtained from: //depot/projects/mpsafetty/... Reviewed by: thompsa |
| /freebsd-11-stable/sys/kern/ | ||
| H A D | tty.c | diff 183922 Wed Oct 15 15:13:00 MDT 2008 ed Import some improvements to the TTY code from the MPSAFE TTY branch. - Change the ddb(4) commands to be more useful (by thompsa@): - `show ttys' is now called `show all ttys'. This command will now also display the address where the TTY data structure resides. - Add `show tty <addr>', which dumps the TTY in a readable form. - Place an upper bound on the TTY buffer sizes. Some drivers do not want to care about baud rates. Protect these drivers by preventing the TTY buffers from getting enormous. Right now we'll just clamp it to 64K, which is pretty high, taking into account that these buffers are only used by the built-in discipline. - Only call ttydev_leave() when needed. Back in April/May the TTY reference counting mechanism was a little different, which required us to call ttydev_leave() each time we finished a cdev operation. Nowadays we only need to call ttydev_leave() when we really mark it as being closed. - Improve return codes of read() and write() on TTY device nodes. - Make sure we really wake up all blocked threads when the driver calls tty_rel_gone(). There were some possible code paths where we didn't properly wake up any readers/writers. - Add extra assertions to prevent sleeping on a TTY that has been abandoned by the driver. - Use ttydev_cdevsw as a more reliable method to figure out whether a device node is a real TTY device node. Obtained from: //depot/projects/mpsafetty/... Reviewed by: thompsa |
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