Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1218872
| From | Juergen Gross <jgross@suse.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH] xen: limit memory to architectural maximum |
| Date | 2015-09-04 14:20 +0200 |
| Message-ID | <q4Y8i-1MD-5@gated-at.bofh.it> (permalink) |
| Organization | linux.* mail to news gateway |
When a pv-domain (including dom0) is started it tries to size it's p2m list according to the maximum possible memory amount it ever can achieve. Limit the initial maximum memory size to the architectural limit of the hardware in order to avoid overflows during remapping of memory. This problem will occur when dom0 is started with an initial memory size being a multiple of 1GB, but without specifying it's maximum memory size. The kernel must be configured without CONFIG_XEN_BALLOON_MEMORY_HOTPLUG for the problem to happen. Reported-by: Roger Pau Monné <roger.pau@citrix.com> Signed-off-by: Juergen Gross <jgross@suse.com> --- arch/x86/xen/setup.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c index 4765285..f5ef674 100644 --- a/arch/x86/xen/setup.c +++ b/arch/x86/xen/setup.c @@ -537,7 +537,7 @@ static unsigned long __init xen_get_pages_limit(void) #ifdef CONFIG_X86_32 limit = GB(64) / PAGE_SIZE; #else - limit = ~0ul; + limit = MAXMEM / PAGE_SIZE; if (!xen_initial_domain() && xen_512gb_limit) limit = GB(512) / PAGE_SIZE; #endif -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread
[PATCH] xen: limit memory to architectural maximum Juergen Gross <jgross@suse.com> - 2015-09-04 14:20 +0200 Re: [Xen-devel] [PATCH] xen: limit memory to architectural maximum Roger Pau Monné <roger.pau@citrix.com> - 2015-09-04 16:20 +0200 Re: [Xen-devel] [PATCH] xen: limit memory to architectural maximum David Vrabel <david.vrabel@citrix.com> - 2015-09-04 18:00 +0200
csiph-web