* question on i386 very early memory detection cleanup patch
@ 2004-09-01 12:17 Jan Beulich
0 siblings, 0 replies; 3+ messages in thread
From: Jan Beulich @ 2004-09-01 12:17 UTC (permalink / raw)
To: hpa; +Cc: linux-kernel
Is there a particular reason why this patch changes the alignment of
cpu_gdt_table to be page rather than cache line aligned? This is
particulary strange to me because the alignment is guaranteed only for
the boot processor, but not for any of the APs; for the latter ones
there isn't even a string guarantee that the table would be cache line
aligned (which it really should be); the weak guarantee only is through
an appearant assumption of GDT_ENTRIES being a sufficiently large power
of two.
Thanks, Jan
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: question on i386 very early memory detection cleanup patch
@ 2004-09-02 6:53 Jan Beulich
0 siblings, 0 replies; 3+ messages in thread
From: Jan Beulich @ 2004-09-02 6:53 UTC (permalink / raw)
To: hpa; +Cc: linux-kernel
If you refer to the 4G/4G split patch - this isn't part of mainline, and
if it needs it would seem it should do this adjustment, not an unrelated
patch. Jan
>>> "H. Peter Anvin" <hpa@zytor.com> 01.09.04 18:20:01 >>>
Jan Beulich wrote:
> Is there a particular reason why this patch changes the alignment of
> cpu_gdt_table to be page rather than cache line aligned? This is
> particulary strange to me because the alignment is guaranteed only
for
> the boot processor, but not for any of the APs; for the latter ones
> there isn't even a string guarantee that the table would be cache
line
> aligned (which it really should be); the weak guarantee only is
through
> an appearant assumption of GDT_ENTRIES being a sufficiently large
power
> of two.
>
> Thanks, Jan
The 4+4 GB patch apparently needs it.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: question on i386 very early memory detection cleanup patch
[not found] <s136d15f.000@emea1-mh.id2.novell.com>
@ 2004-09-02 8:51 ` H. Peter Anvin
0 siblings, 0 replies; 3+ messages in thread
From: H. Peter Anvin @ 2004-09-02 8:51 UTC (permalink / raw)
To: Jan Beulich; +Cc: linux-kernel
Jan Beulich wrote:
> If you refer to the 4G/4G split patch - this isn't part of mainline, and
> if it needs it would seem it should do this adjustment, not an unrelated
> patch. Jan
>
It is, or at least was, in the -mm tree, however.
-hpa
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2004-09-02 8:51 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
[not found] <s136d15f.000@emea1-mh.id2.novell.com>
2004-09-02 8:51 ` question on i386 very early memory detection cleanup patch H. Peter Anvin
2004-09-02 6:53 Jan Beulich
-- strict thread matches above, loose matches on Subject: below --
2004-09-01 12:17 Jan Beulich
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox