[lkml]   [1996]   [Oct]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: Byte article - 64 bit Unix
> I think we need to distinguish a few things about 64 bit OS's...
> Does the user address space have 64 bit addressability?

In theory Linux/Alpha could eventually give the user 62 bits of VM
address space. The current CPU implementations limit us to 43 bits.

> Do file offsets have 64 bit addressability?

Yes, off_t is 64 bits. None of the underlying filesystems currently
support files that big, but the VFS layer does not disallow it.

> Does the CPU do 64 bit arithmetic?
> Do memory move and copy routines use 64 bit at a time?

Of course.


 \ /
  Last update: 2005-03-22 13:37    [W:0.031 / U:2.228 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site