Witam, > > > > cat /proc/kpageflags on sparc64 causes the box to lock. > > > > I can not write on any terminal - but I can issue sysrqs and switch > > > > between consoles. > > > > > > > > cat process hangs in read(3, ... > > > > > > cat /proc/kpagecount produces similar symptoms. box is locked - sysrq-w sshd trace: > > > > > > __down > > > __down_interruptible > > > kobject_get > > > lock_kernel > > > chrdev_open > > > __dentry_open > > > nameidata_to_filp > > > open_pathname > > > do_sys_open > > > sparc32_open > > > linux_sparc_syscall32 > > > > Perhaps this is related to sparsemem. > > > > Can you change line 710 of fs/proc/proc_misc.c to: > > > > ppage = NULL; > > Sure. > > > ..and see if it still breaks? > > Yes it does - the same way as eariler. Box is locked, processes stuck in D state > and after a while "BUG: soft lockup - CPU#0 stuck for 11s!". My mistake. I run cat /proc/kpageflags in the first place - so how could anything change :) cat /proc/kpagecount on the other hand - with the change in line 710 - locks the box. Sysrq works, changing consoles works, but there is no "BUG: soft lockup ..." message. After a while the box becomes totaly unresponsive - even caps lock doesn't work, no responses to ping. - To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
