Messages in this thread | | | Date | Tue, 22 Oct 2002 22:27:00 +0200 (CEST) | From | Ingo Molnar <> | Subject | Re: [patch] generic nonlinear mappings, 2.5.44-mm2-D0 |
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On Tue, 22 Oct 2002, Andrew Morton wrote:
> We seem to have lost a pte_page_unlock() from fremap.c:zap_pte()? I > fixed up the ifdef tangle in there within the shpte-ng patch and then > put the pte_page_unlock() back.
ok. I too fixed up the shpte #ifdef tangle in there as well, and it was complex for no good reason, so i suspected that it was missing a line or two.
> I also added a page_cache_release() to the error path in > filemap_populate(), if install_page() failed.
hm, i somehow missed to add this, this was reported once already.
> The 2TB file size limit for mmap on non-PAE is a little worrisome. [...]
the limit is only there for 32-bit ptes on 32-bit platforms. 64-bit ptes (both true 64-bit architectures and x86-PAE) has a ~64 zetabyte filesize limit. I do not realistically believe that any 32-bit x86 box that is connected to a larger than 2 TB disk array cannot possibly run a PAE kernel. Just like you need PAE for more than 4 GB physical RAM. I find it a bit worrisome that 32-bit x86 ptes can only support up to 4 GB of physical RAM, but such is life :-)
Ingo
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