From: guoren@xxxxxxxxxx <guoren@xxxxxxxxxx> > Sent: 21 December 2023 15:47 > > From: Guo Ren <guoren@xxxxxxxxxxxxxxxxx> > > When the task is in COMPAT mode, the arch_get_mmap_end should be 2GB, > not TASK_SIZE_64. The TASK_SIZE has contained is_compat_mode() > detection, so change the definition of STACK_TOP_MAX to TASK_SIZE > directly. Why 2G ? IIRC for 32-bit native x86 the limit is 3G, but in compat mode it is (just under) 4G. There is a special mmap option (for programs like wine) to limit mmap() to 2G. David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)
