lkml.org 
[lkml]   [2009]   [Mar]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [Xen-devel] [PATCH 10/27] xen: make sure swiotlb allocation isphysically contigious
Jan Beulich wrote:
>
> While on native using alloc_bootmem_low_pages() is a requirement here,
> on Xen this should explicitly not be used, as we realized just a couple of
> days ago:

Which conversation was this?

> The way the bootmem allocator works, running out of space
> below 4Gb is pretty easy on machines with lots of memory, and since the
> swiotlb is a requirement for Dom0, the risk of allocation failures must be
> kept as low as possible.
>

Are we talking about a 32 or 64 bit dom0 here? If its 32-bit, then yes,
low memory is a precious resource, but I don't see why that depends on
the total amount of memory. And if its 64-bit, why is below-4G
particularly constrained? That would only matter for 32-bit devices?

J


\
 
 \ /
  Last update: 2009-03-16 20:41    [W:0.835 / U:0.080 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site