Pavel Tatashin 6f84f8d158 xen, mm: allow deferred page initialization for xen pv domains ... Juergen Gross noticed that commit f7f99100d8 ("mm: stop zeroing memory during allocation in vmemmap") broke XEN PV domains when deferred struct page initialization is enabled. This is because the xen's PagePinned() flag is getting erased from struct pages when they are initialized later in boot. Juergen fixed this problem by disabling deferred pages on xen pv domains. It is desirable, however, to have this feature available as it reduces boot time. This fix re-enables the feature for pv-dmains, and fixes the problem the following way: The fix is to delay setting PagePinned flag until struct pages for all allocated memory are initialized, i.e. until after free_all_bootmem(). A new x86_init.hyper op init_after_bootmem() is called to let xen know that boot allocator is done, and hence struct pages for all the allocated memory are now initialized. If deferred page initialization is enabled, the rest of struct pages are going to be initialized later in boot once page_alloc_init_late() is called. xen_after_bootmem() walks page table's pages and marks them pinned. Link: http://lkml.kernel.org/r/20180226160112.24724-2-pasha.tatashin@oracle.com Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com> Acked-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Juergen Gross <jgross@suse.com> Tested-by: Juergen Gross <jgross@suse.com> Cc: Daniel Jordan <daniel.m.jordan@oracle.com> Cc: Pavel Tatashin <pasha.tatashin@oracle.com> Cc: Alok Kataria <akataria@vmware.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Andy Lutomirski <luto@kernel.org> Cc: Laura Abbott <labbott@redhat.com> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: Mathias Krause <minipli@googlemail.com> Cc: Jinbum Park <jinb.park7@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Baoquan He <bhe@redhat.com> Cc: Jia Zhang <zhang.jia@linux.alibaba.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Stefano Stabellini <sstabellini@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2018-04-11 10:28:38 -07:00
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asm	xen, mm: allow deferred page initialization for xen pv domains	2018-04-11 10:28:38 -07:00
uapi/asm	ARM:	2018-04-09 11:42:31 -07:00