FreeBSD source tree https://cgit-dev.freebsd.org/src-test2/atom?h=release%2F11.0.0 2016-08-10T20:31:10Z 2016-08-10T20:31:10Z Alan Cox alc@FreeBSD.org 2016-08-10T20:31:10Z urn:sha1:7769821166d94a3a0650c28c21ef1143df362385 Correct a spelling error. Approved by: re (kib) 2016-08-10T12:11:11Z Konstantin Belousov kib@FreeBSD.org 2016-08-10T12:11:11Z urn:sha1:5f758babca7142cefe5eaf7b4ab624c82c5d85f7 Do not delegate a work to geom event thread which can be done inline. MFC r303703: Explain why swapgeom_close_ev() is delegated. Approved by: re (gjb) 2016-08-05T17:49:13Z Alan Cox alc@FreeBSD.org 2016-08-05T17:49:13Z urn:sha1:817ff25c71db767db3a3b4f23fb35a418b06be0e Remove a probe declaration that has been unused since r292469, when vm_pageout_grow_cache() was replaced. Approved by: re (gjb) 2016-08-04T14:34:33Z Konstantin Belousov kib@FreeBSD.org 2016-08-04T14:34:33Z urn:sha1:b2dae14c49d2218287ccd5c8aada8cc8d499803b Fix style and typo. Approved by: re (gjb) 2016-08-01T21:21:26Z Alan Cox alc@FreeBSD.org 2016-08-01T21:21:26Z urn:sha1:62648ee887158d59fe81b405cc797d838ef58a11 Remove any mention of cache (PG_CACHE) pages from the comments in vm_pageout_scan(). That function has not cached pages since r284376. Approved by: re (kib) 2016-07-25T13:28:59Z Konstantin Belousov kib@FreeBSD.org 2016-07-25T13:28:59Z urn:sha1:ca17b3e53b6ba6777d15e22dd7038194ab7cbda6 In vgonel(), postpone setting BO_DEAD until VOP_RECLAIM() is called, if vnode is VMIO. For VMIO vnodes, set BO_DEAD in vm_object_terminate(). MFC r302580: Fix grammar. Approved by: re (gjb) 2016-07-23T21:56:52Z Alan Cox alc@FreeBSD.org 2016-07-23T21:56:52Z urn:sha1:82d9ac37733efb137df613bfec0c3ad1442fe9db Add a comment describing the 'fast path' that was introduced in r270011. Approved by: re (gjb) 2016-07-21T20:11:43Z Alan Cox alc@FreeBSD.org 2016-07-21T20:11:43Z urn:sha1:79a180b126bc21df83390031b16a8a074b5d6c13 Break up vm_fault()'s implementation of the read-ahead and delete-behind optimizations into two distinct pieces. The first piece consists of the code that should only be performed once per page fault and requires the map to be locked. The second piece consists of the code that should be performed each time a pager is called on an object in the shadow chain. (This second piece expects the map to be unlocked.) Previously, the entire implementation could be executed multiple times. Moreover, the second and subsequent executions would occur with the map unlocked. Usually, the ensuing unsynchronized accesses to the map were harmless because the map was not changing. Nonetheless, it was possible for a use-after-free error to occur, where vm_fault() wrote to a freed map entry. This change corrects that problem. Approved by: re (gjb) 2016-07-07T20:58:16Z Alan Cox alc@FreeBSD.org 2016-07-07T20:58:16Z urn:sha1:381b724280e79a651ff1baf00ba9d00581dcda97 vm_offset_t. (This field is used to detect sequential access to the virtual address range represented by the map entry.) There are three reasons to make this change. First, a vm_offset_t is smaller on 32-bit architectures. Consequently, a struct vm_map_entry is now smaller on 32-bit architectures. Second, a vm_offset_t can be written atomically, whereas it may not be possible to write a vm_pindex_t atomically on a 32-bit architecture. Third, using a vm_pindex_t makes the next_read field dependent on which object in the shadow chain is being read from. Replace an "XXX" comment. Reviewed by: kib Approved by: re (gjb) Sponsored by: EMC / Isilon Storage Division 2016-07-07T18:37:12Z Colin Percival cperciva@FreeBSD.org 2016-07-07T18:37:12Z urn:sha1:34caa842a49c9d6902bb50ad7b93e8e32f5044af of CPUs present. On amd64 this unbreaks the boot for systems with 92 or more CPUs; the limit will vary on other systems depending on the size of their uma_zone and uma_cache structures. The major consumer of pages during UMA startup is the 19 zone structures which are set up before UMA has bootstrapped itself sufficiently to use the rest of the available memory: UMA Slabs, UMA Hash, 4 / 6 / 8 / 12 / 16 / 32 / 64 / 128 / 256 Bucket, vmem btag, VM OBJECT, RADIX NODE, MAP, KMAP ENTRY, MAP ENTRY, VMSPACE, and fakepg. If the zone structures occupy more than one page, they will not share pages and the number of pages currently needed for startup is 19 * pages_per_zone + N, where N is the number of pages used for allocating other structures; on amd64 N = 3 at present (2 pages are allocated for UMA Kegs, and one page for UMA Hash). This patch adds a new definition UMA_BOOT_PAGES_ZONES, currently set to 32, and if a zone structure does not fit into a single page sets boot_pages to UMA_BOOT_PAGES_ZONES * pages_per_zone instead of UMA_BOOT_PAGES (which remains at 64). Consequently this patch has no effect on systems where the zone structure fits into 2 or fewer pages (on amd64, 59 or fewer CPUs), but increases boot_pages sufficiently on systems where the large number of CPUs makes this structure larger. It seems safe to assume that systems with 60+ CPUs can afford to set aside an additional 128kB of memory per 32 CPUs. The vm.boot_pages tunable continues to override this computation, but is unlikely to be necessary in the future. Tested on: EC2 x1.32xlarge Relnotes: FreeBSD can now boot on 92+ CPU systems without requiring vm.boot_pages to be manually adjusted. Reviewed by: jeff, alc, adrian Approved by: re (kib)