id,summary,reporter,owner,description,type,status,component,version,resolution,keywords,cc,guest,host 9878,"bug when use as ""vboxsf + loop device + large RAM"" -> fixed as of Jan 5 2012",mchen,,"When I running VBOX on my WinXP, and guest running RHEL5.7 Then I mount a dir with vboxsf, next I use loop device for mount another file into workspace. step: mount -t vboxsf cfs /cfs mount -t ext2 -o loop /cfs/test /test result: VM_RAM = 500MB, ok VM_RAM = 800MB, some computer ok, others faild, OS is same, but CPU difference. VM_RAM = 1100MB, all faild info: 00:00:08.609 Guest Log: vboxguest: major 0, IRQ 20, I/O port d020, MMIO at 00000000f0000000 (size 0x400000) 00:00:10.762 Guest Log: VbglR0HGCMInternalCall: vbglR0HGCMInternalPreprocessCall failed. rc=-2 00:00:10.763 Guest Log: VBoxGuestCommonIOCtl: HGCM_CALL: 64 Failed. rc=-2. 00:00:10.765 Guest Log: VbglR0HGCMInternalCall: vbglR0HGCMInternalPreprocessCall failed. rc=-2 00:00:10.766 Guest Log: VBoxGuestCommonIOCtl: HGCM_CALL: 64 Failed. rc=-2. ",defect,closed,guest additions,VirtualBox 4.1.6,duplicate,vboxsf loop largeRAM,,Linux,Windows