search for: decrease_reserv

From: David Vrabel <david.vrabel@citrix.com> get_balloon_scratch_page() disables preemption so we cannot call alloc_page() in between get/put_balloon_scratch_page(). Shuffle bits around in decrease_reservation() to avoid this. Signed-off-by: David Vrabel <david.vrabel@citrix.com> --- drivers/xen/balloon.c | 23 +++++++++++------------ 1 files changed, 11 insertions(+), 12 deletions(-) diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c index a50c6e3..b232908 100644 --- a/drivers/xe...

Hi guys, Looks like the MPT entry still has the pfn after PV dom0 call to decrease_reservation(). Not sure if this is a major bug, but confusing for debugging. For HVM guests, the MPT seems invalidated as side effect of invalidating the p2m. Btw, this in xen 4.1.3-rc1. Thanks, Mukesh

...!xen_feature(XENFEAT_auto_translated_physmap)) { @@ -371,6 +372,7 @@ static enum bp_state increase_reservation(unsigned long nr_pages) 0); BUG_ON(ret); } +#endif /* Relinquish the page back to the allocator. */ ClearPageReserved(page); @@ -419,6 +421,7 @@ static enum bp_state decrease_reservation(unsigned long nr_pages, gfp_t gfp) scrub_page(page); +#ifdef CONFIG_XEN_HAVE_PVMMU if (xen_pv_domain() && !PageHighMem(page)) { if (!xen_feature(XENFEAT_auto_translated_physmap)) { ret = HYPERVISOR_update_va_mapping( @@ -427,6 +430,7 @@ static enum bp_state decrease_...

...0; struct page* page; mutex_lock(&balloon_mutex); while (pgno < nr_pages) { - page = balloon_retrieve(true); - if (page) { + page = balloon_retrieve(highmem); + if (page && PageHighMem(page) == highmem) { pages[pgno++] = page; } else { enum bp_state st; - st = decrease_reservation(nr_pages - pgno, GFP_HIGHUSER); + if (page) + balloon_append(page); + st = decrease_reservation(nr_pages - pgno, + highmem ? GFP_HIGHUSER : GFP_USER); if (st != BP_DONE) goto out_undo; } diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c index f914b26..7b9b1d1 1006...

Defines XENMEM subop hypercall for PV vNUMA enabled guests and data structures that provide vNUMA topology information from per-domain vnuma topology build info. Signed-off-by: Elena Ufimtseva <ufimtseva@gmail.com> --- Changes since RFC v2: - fixed code style; - the memory copying in hypercall happens in one go for arrays; - fixed error codes logic; --- xen/common/domain.c | 10

...@eu.citrix.com> --- drivers/xen/balloon.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c index a3dc75d..3101cf6 100644 --- a/drivers/xen/balloon.c +++ b/drivers/xen/balloon.c @@ -430,8 +430,13 @@ static enum bp_state decrease_reservation(unsigned long nr_pages, gfp_t gfp) /* No more mappings: invalidate P2M and add to balloon. */ for (i = 0; i < nr_pages; i++) { pfn = mfn_to_pfn(frame_list[i]); - __set_phys_to_machine(pfn, - pfn_to_mfn(page_to_pfn(__get_cpu_var(balloon_scratch_page)))); + if (!xen_feature(XENFEA...

hi I try to understand the code of balloon ,and got confused about the following parts of code: static int decrease_reservation(unsigned long nr_pages) { .... if (!PageHighMem(page)) { v = phys_to_virt(pfn << PAGE_SHIFT); scrub_pages(v, 1); ret = HYPERVISOR_update_va_mapping( (unsigned long)v, __pte_ma(0), 0); BUG_ON(ret); }...

...> #include <asm/xen/hypervisor.h> @@ -154,8 +154,7 @@ static struct page *balloon_retrieve(void) if (PageHighMem(page)) { balloon_stats.balloon_high--; inc_totalhigh_pages(); - } - else + } else balloon_stats.balloon_low--; totalram_pages++; @@ -274,7 +273,8 @@ static int decrease_reservation(unsigned long nr_pages) nr_pages = ARRAY_SIZE(frame_list); for (i = 0; i < nr_pages; i++) { - if ((page = alloc_page(GFP_BALLOON)) == NULL) { + page = alloc_page(GFP_BALLOON); + if (!page) { nr_pages = i; need_sleep = 1; break; @@ -290,7 +290,7 @@ static int decrease_r...

...> #include <asm/xen/hypervisor.h> @@ -154,8 +154,7 @@ static struct page *balloon_retrieve(void) if (PageHighMem(page)) { balloon_stats.balloon_high--; inc_totalhigh_pages(); - } - else + } else balloon_stats.balloon_low--; totalram_pages++; @@ -274,7 +273,8 @@ static int decrease_reservation(unsigned long nr_pages) nr_pages = ARRAY_SIZE(frame_list); for (i = 0; i < nr_pages; i++) { - if ((page = alloc_page(GFP_BALLOON)) == NULL) { + page = alloc_page(GFP_BALLOON); + if (!page) { nr_pages = i; need_sleep = 1; break; @@ -290,7 +290,7 @@ static int decrease_r...

...> #include <asm/xen/hypervisor.h> @@ -154,8 +154,7 @@ static struct page *balloon_retrieve(void) if (PageHighMem(page)) { balloon_stats.balloon_high--; inc_totalhigh_pages(); - } - else + } else balloon_stats.balloon_low--; totalram_pages++; @@ -274,7 +273,8 @@ static int decrease_reservation(unsigned long nr_pages) nr_pages = ARRAY_SIZE(frame_list); for (i = 0; i < nr_pages; i++) { - if ((page = alloc_page(GFP_BALLOON)) == NULL) { + page = alloc_page(GFP_BALLOON); + if (!page) { nr_pages = i; need_sleep = 1; break; @@ -290,7 +290,7 @@ static int decrease_r...

Hi Jeremy. Here are the 3 patches for ia64/xen support. The first one is just to move manage.c under drivers/xen. This is trivial. The second and third ones are for compilation fix on ia64. You may want to postpone those 2 patches to make your merge task easy as you said before. thanks, Diffstat arch/x86/xen/Makefile | 2 +- drivers/xen/Makefile | 2 +-

Hi Jeremy. Here are the 3 patches for ia64/xen support. The first one is just to move manage.c under drivers/xen. This is trivial. The second and third ones are for compilation fix on ia64. You may want to postpone those 2 patches to make your merge task easy as you said before. thanks, Diffstat arch/x86/xen/Makefile | 2 +- drivers/xen/Makefile | 2 +-

...-7141,7 +7141,7 @@ ri->dump_header, r->d, r->order, r->p2mt, - r->gfn, r->mfn); + (unsigned long long)r->gfn, (unsigned long long)r->mfn); } } @@ -7159,7 +7159,7 @@ printf(" %s decrease_reservation d%d o%d g %llx\n", ri->dump_header, r->d, r->order, - r->gfn); + (unsigned long long)r->gfn); } } _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http...

...} + else +#endif + { + page = alloc_domheap_pages(d, a->extent_order, a->memflags); + } + if ( unlikely(page == NULL) ) { if ( !opt_tmem || (a->extent_order != 0) ) @@ -270,6 +299,15 @@ static void decrease_reservation(struct memop_args *a) && p2m_pod_decrease_reservation(a->domain, gmfn, a->extent_order) ) continue; +#ifdef CONFIG_ARM + /* With the lake for iommu, dom0 must retrieve the same pfn when + * the hypercall populate_physmap is called. +...

This series implements ballooning for Xen on ARM and builds and Mukesh''s PVH privcmd stuff to implement foreign page mapping on ARM, replacing the old "HACK: initial (very hacky) XENMAPSPACE_gmfn_foreign" patch. The baseline is a bit complex, it is basically Stefano''s xenarm-forlinus branch (commit bbd6eb29214e) merged with Konrad''s linux-next-pvh branch

Hi! i notice a serious regression with 3.5 as Dom0 kernel (3.4 was rock stable): 1st: only the GPU PCI Passthrough works, the PCI USB Controller is not recognized within the DomU (HVM Win7 64) Dom0 cmdline is: ro root=LABEL=dom0root xen-pciback.hide=(08:00.0)(08:00.1)(00:1d.0)(00:1d.1)(00:1d.2)(00:1d.7) security=apparmor noirqdebug nouveau.msi=1 Only 8:00.0 and 8:00.1 get passed through

2013/10/29, mail fetch <fetchmail.0104@gmail.com>: > Hi all, > > I just saw a know bug from wiki that network doesn''t work in guest in > arndale board : > > Network doesn''t work in the guest > > Contact: julien.grall@citrix.com > Status: In progress > Description: Network doesn''t work in the guest when an ehternet cable is > plugged

...; PAGE_SHIFT), @@ -339,11 +470,6 @@ set_p2m: __free_page(page); } -#ifdef CONFIG_XEN_BALLOON_MEMORY_HOTPLUG - if (balloon_stats.hotplug_start_paddr) - balloon_stats.hotplug_size += rc << PAGE_SHIFT; -#endif - balloon_stats.current_pages += rc; out: @@ -379,7 +505,7 @@ static int decrease_reservation(unsigned long nr_pages) scrub_page(page); - if (!PageHighMem(page)) { + if (xen_pv_domain() && !PageHighMem(page)) { ret = HYPERVISOR_update_va_mapping( (unsigned long)__va(pfn << PAGE_SHIFT), __pte_ma(0), 0); @@ -424,18 +550,18 @@ static void balloon_proce...

Populate-on-demand: Check pages being returned by the balloon driver This patch series is the second result of my work last summer on decreasing fragmentation of superpages in a guests'' p2m when using populate-on-demand. This patch series is against 4.1; I''m posting it to get feedback on the viability of getting a ported version of this patch into 4.2. As with the previous

Hi, Here is the third version of memory hotplug support for Xen guests patch. This one cleanly applies to git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git repository, xen/memory-hotplug head. On Fri, Aug 06, 2010 at 04:03:18PM +0400, Vasiliy G Tolstov wrote: [...] > Testing on sles 11 sp1 and opensuse 11.3. On results - send e-mail.. Thx. On Fri, Aug 06, 2010 at 12:34:08PM