scottl 2006-09-13 15:48:15 UTC FreeBSD src repository
Modified files: sys/kern subr_witness.c sys/dev/syscons scmouse.c syscons.c syscons.h Log: Introduce a spinlock for synchronizing access to the video output hardware in syscons. This replaces a simple access semaphore that was assumed to be protected by Giant but often was not. If two threads that were otherwise SMP-safe called printf at the same time, there was a high likelyhood that the semaphore would get corrupted and result in a permanently frozen video console. This is similar to what is already done in the serial console drivers. Revision Changes Path 1.41 +4 -4 src/sys/dev/syscons/scmouse.c 1.446 +17 -14 src/sys/dev/syscons/syscons.c 1.87 +17 -1 src/sys/dev/syscons/syscons.h 1.218 +1 -0 src/sys/kern/subr_witness.c _______________________________________________ cvs-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/cvs-all To unsubscribe, send any mail to "[EMAIL PROTECTED]"