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charset=us-ascii Content-Disposition: inline tree: https://android.googlesource.com/kernel/common android14-5.15 head: 14f411bb7352f0fa2c69841b8c2ed1584f9db6de commit: a7f55c5c739a960c94858f9fbd4776e03ef05bbd [1/1] ANDROID: mm: add cma allocation statistics config: arm-randconfig-004-20250528 (https://download.01.org/0day-ci/archive/20250528/202505280543.PiYii3En-lkp@intel.com/config) compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project f819f46284f2a79790038e1f6649172789734ae8) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250528/202505280543.PiYii3En-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202505280543.PiYii3En-lkp@intel.com/ All warnings (new ones prefixed by >>): >> mm/page_alloc.c:9247: warning: Function parameter or member 'info' not described in 'alloc_contig_range' vim +9247 mm/page_alloc.c 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9222 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9223 /** 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9224 * alloc_contig_range() -- tries to allocate given range of pages 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9225 * @start: start PFN to allocate 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9226 * @end: one-past-the-last PFN to allocate f0953a1bbaca71e Ingo Molnar 2021-05-06 9227 * @migratetype: migratetype of the underlying pageblocks (either 0815f3d81d76dfb Michal Nazarewicz 2012-04-03 9228 * #MIGRATE_MOVABLE or #MIGRATE_CMA). All pageblocks 0815f3d81d76dfb Michal Nazarewicz 2012-04-03 9229 * in range must have the same migratetype and it must 0815f3d81d76dfb Michal Nazarewicz 2012-04-03 9230 * be either of the two. ca96b625341027f Lucas Stach 2017-02-24 9231 * @gfp_mask: GFP mask to use during compaction 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9232 * 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9233 * The PFN range does not have to be pageblock or MAX_ORDER_NR_PAGES 2c7452a075d4db2 Mike Kravetz 2018-04-05 9234 * aligned. The PFN range must belong to a single zone. 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9235 * 2c7452a075d4db2 Mike Kravetz 2018-04-05 9236 * The first thing this routine does is attempt to MIGRATE_ISOLATE all 2c7452a075d4db2 Mike Kravetz 2018-04-05 9237 * pageblocks in the range. Once isolated, the pageblocks should not 2c7452a075d4db2 Mike Kravetz 2018-04-05 9238 * be modified by others. 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9239 * a862f68a8b36008 Mike Rapoport 2019-03-05 9240 * Return: zero on success or negative error code. On success all 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9241 * pages which PFN is in [start, end) are allocated for the caller and 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9242 * need to be freed with free_contig_range(). 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9243 */ 0815f3d81d76dfb Michal Nazarewicz 2012-04-03 9244 int alloc_contig_range(unsigned long start, unsigned long end, a7f55c5c739a960 Minchan Kim 2021-06-29 9245 unsigned migratetype, gfp_t gfp_mask, a7f55c5c739a960 Minchan Kim 2021-06-29 9246 struct acr_info *info) 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 @9247 { 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9248 unsigned long outer_start, outer_end; d00181b96eb86c9 Kirill A. Shutemov 2015-11-06 9249 unsigned int order; d00181b96eb86c9 Kirill A. Shutemov 2015-11-06 9250 int ret = 0; a82943cdfbe8acb Peifeng Li 2022-03-15 9251 bool skip_drain_all_pages = false; 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9252 bb13ffeb9f6bfeb Mel Gorman 2012-10-08 9253 struct compact_control cc = { bb13ffeb9f6bfeb Mel Gorman 2012-10-08 9254 .nr_migratepages = 0, bb13ffeb9f6bfeb Mel Gorman 2012-10-08 9255 .order = -1, bb13ffeb9f6bfeb Mel Gorman 2012-10-08 9256 .zone = page_zone(pfn_to_page(start)), 9cb760bc6adde97 Minchan Kim 2020-12-21 9257 .mode = gfp_mask & __GFP_NORETRY ? MIGRATE_ASYNC : MIGRATE_SYNC, bb13ffeb9f6bfeb Mel Gorman 2012-10-08 9258 .ignore_skip_hint = true, 2583d6713267a4c Vlastimil Babka 2017-11-17 9259 .no_set_skip_hint = true, 7dea19f9ee636cb Michal Hocko 2017-05-03 9260 .gfp_mask = current_gfp_context(gfp_mask), b06eda091e5d65b Rik van Riel 2020-04-01 9261 .alloc_contig = true, bb13ffeb9f6bfeb Mel Gorman 2012-10-08 9262 }; bb13ffeb9f6bfeb Mel Gorman 2012-10-08 9263 INIT_LIST_HEAD(&cc.migratepages); bb13ffeb9f6bfeb Mel Gorman 2012-10-08 9264 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9265 /* 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9266 * What we do here is we mark all pageblocks in range as 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9267 * MIGRATE_ISOLATE. Because pageblock and max order pages may 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9268 * have different sizes, and due to the way page allocator 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9269 * work, we align the range to biggest of the two pages so 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9270 * that page allocator won't try to merge buddies from 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9271 * different pageblocks and change MIGRATE_ISOLATE to some 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9272 * other migration type. 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9273 * 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9274 * Once the pageblocks are marked as MIGRATE_ISOLATE, we 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9275 * migrate the pages from an unaligned range (ie. pages that 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9276 * we are interested in). This will put all the pages in 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9277 * range back to page allocator as MIGRATE_ISOLATE. 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9278 * 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9279 * When this is done, we take the pages in range from page 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9280 * allocator removing them from the buddy system. This way 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9281 * page allocator will never consider using them. 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9282 * 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9283 * This lets us mark the pageblocks back as 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9284 * MIGRATE_CMA/MIGRATE_MOVABLE so that free pages in the 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9285 * aligned range but not in the unaligned, original range are 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9286 * put back to page allocator so that buddy can use them. 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9287 */ 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9288 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9289 ret = start_isolate_page_range(pfn_max_align_down(start), d381c54760dcfad Michal Hocko 2018-12-28 9290 pfn_max_align_up(end), migratetype, 0); a7f55c5c739a960 Minchan Kim 2021-06-29 9291 if (ret) { a7f55c5c739a960 Minchan Kim 2021-06-29 9292 info->err |= ACR_ERR_ISOLATE; 86a595f961360c9 Bob Liu 2012-10-25 9293 return ret; a7f55c5c739a960 Minchan Kim 2021-06-29 9294 } 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9295 a82943cdfbe8acb Peifeng Li 2022-03-15 9296 trace_android_vh_cma_drain_all_pages_bypass(migratetype, a82943cdfbe8acb Peifeng Li 2022-03-15 9297 &skip_drain_all_pages); c46b91c287e34cb Suren Baghdasaryan 2022-05-12 9298 if (!skip_drain_all_pages) 7612921f2376d51 Vlastimil Babka 2020-12-14 9299 drain_all_pages(cc.zone); 7612921f2376d51 Vlastimil Babka 2020-12-14 9300 8ef5849fa8a2c78 Joonsoo Kim 2016-01-14 9301 /* 8ef5849fa8a2c78 Joonsoo Kim 2016-01-14 9302 * In case of -EBUSY, we'd like to know which page causes problem. 63cd448908b5eb5 Mike Kravetz 2017-11-29 9303 * So, just fall through. test_pages_isolated() has a tracepoint 63cd448908b5eb5 Mike Kravetz 2017-11-29 9304 * which will report the busy page. 63cd448908b5eb5 Mike Kravetz 2017-11-29 9305 * 63cd448908b5eb5 Mike Kravetz 2017-11-29 9306 * It is possible that busy pages could become available before 63cd448908b5eb5 Mike Kravetz 2017-11-29 9307 * the call to test_pages_isolated, and the range will actually be 63cd448908b5eb5 Mike Kravetz 2017-11-29 9308 * allocated. So, if we fall through be sure to clear ret so that 63cd448908b5eb5 Mike Kravetz 2017-11-29 9309 * -EBUSY is not accidentally used or returned to caller. 8ef5849fa8a2c78 Joonsoo Kim 2016-01-14 9310 */ a7f55c5c739a960 Minchan Kim 2021-06-29 9311 ret = __alloc_contig_migrate_range(&cc, start, end, info); 8ef5849fa8a2c78 Joonsoo Kim 2016-01-14 9312 if (ret && ret != -EBUSY) 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9313 goto done; 63cd448908b5eb5 Mike Kravetz 2017-11-29 9314 ret = 0; 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9315 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9316 /* 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9317 * Pages from [start, end) are within a MAX_ORDER_NR_PAGES 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9318 * aligned blocks that are marked as MIGRATE_ISOLATE. What's 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9319 * more, all pages in [start, end) are free in page allocator. 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9320 * What we are going to do is to allocate all pages from 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9321 * [start, end) (that is remove them from page allocator). 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9322 * 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9323 * The only problem is that pages at the beginning and at the 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9324 * end of interesting range may be not aligned with pages that 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9325 * page allocator holds, ie. they can be part of higher order 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9326 * pages. Because of this, we reserve the bigger range and 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9327 * once this is done free the pages we are not interested in. 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9328 * 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9329 * We don't have to hold zone->lock here because the pages are 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9330 * isolated thus they won't get removed from buddy. 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9331 */ 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9332 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9333 order = 0; 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9334 outer_start = start; 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9335 while (!PageBuddy(pfn_to_page(outer_start))) { 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9336 if (++order >= MAX_ORDER) { 8ef5849fa8a2c78 Joonsoo Kim 2016-01-14 9337 outer_start = start; 8ef5849fa8a2c78 Joonsoo Kim 2016-01-14 9338 break; 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9339 } 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9340 outer_start &= ~0UL << order; 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9341 } 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9342 8ef5849fa8a2c78 Joonsoo Kim 2016-01-14 9343 if (outer_start != start) { ab130f9108dcf20 Matthew Wilcox (Oracle 2020-10-15 9344) order = buddy_order(pfn_to_page(outer_start)); 8ef5849fa8a2c78 Joonsoo Kim 2016-01-14 9345 8ef5849fa8a2c78 Joonsoo Kim 2016-01-14 9346 /* 8ef5849fa8a2c78 Joonsoo Kim 2016-01-14 9347 * outer_start page could be small order buddy page and 8ef5849fa8a2c78 Joonsoo Kim 2016-01-14 9348 * it doesn't include start page. Adjust outer_start 8ef5849fa8a2c78 Joonsoo Kim 2016-01-14 9349 * in this case to report failed page properly 8ef5849fa8a2c78 Joonsoo Kim 2016-01-14 9350 * on tracepoint in test_pages_isolated() 8ef5849fa8a2c78 Joonsoo Kim 2016-01-14 9351 */ 8ef5849fa8a2c78 Joonsoo Kim 2016-01-14 9352 if (outer_start + (1UL << order) <= start) 8ef5849fa8a2c78 Joonsoo Kim 2016-01-14 9353 outer_start = start; 8ef5849fa8a2c78 Joonsoo Kim 2016-01-14 9354 } 8ef5849fa8a2c78 Joonsoo Kim 2016-01-14 9355 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9356 /* Make sure the range is really isolated. */ 756d25be457fc54 David Hildenbrand 2019-11-30 9357 if (test_pages_isolated(outer_start, end, 0)) { 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9358 ret = -EBUSY; a7f55c5c739a960 Minchan Kim 2021-06-29 9359 info->err |= ACR_ERR_TEST; 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9360 goto done; 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9361 } 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9362 49f223a9cd96c72 Marek Szyprowski 2012-01-25 9363 /* Grab isolated pages from freelists. */ bb13ffeb9f6bfeb Mel Gorman 2012-10-08 9364 outer_end = isolate_freepages_range(&cc, outer_start, end); 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9365 if (!outer_end) { 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9366 ret = -EBUSY; 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9367 goto done; 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9368 } 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9369 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9370 /* Free head and tail (if any) */ 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9371 if (start != outer_start) 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9372 free_contig_range(outer_start, start - outer_start); 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9373 if (end != outer_end) 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9374 free_contig_range(end, outer_end - end); 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9375 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9376 done: 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9377 undo_isolate_page_range(pfn_max_align_down(start), 0815f3d81d76dfb Michal Nazarewicz 2012-04-03 9378 pfn_max_align_up(end), migratetype); 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9379 return ret; 041d3a8cdc18dc3 Michal Nazarewicz 2011-12-29 9380 } 255f59850708390 David Hildenbrand 2020-05-07 9381 EXPORT_SYMBOL(alloc_contig_range); 5e27a2df03b8933 Anshuman Khandual 2019-11-30 9382 :::::: The code at line 9247 was first introduced by commit :::::: 041d3a8cdc18dc375a128d90bbb753949a81b1fb mm: page_alloc: introduce alloc_contig_range() :::::: TO: Michal Nazarewicz :::::: CC: Marek Szyprowski -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki