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Content-Language: en-US To: Zi Yan , David Hildenbrand , Johannes Weiner , linux-mm@kvack.org Cc: Andrew Morton , Oscar Salvador , Baolin Wang , "Kirill A . Shutemov" , Mel Gorman , Suren Baghdasaryan , Michal Hocko , Brendan Jackman , Richard Chang , linux-kernel@vger.kernel.org References: <20250523191258.339826-1-ziy@nvidia.com> <20250523191258.339826-7-ziy@nvidia.com> From: Vlastimil Babka Autocrypt: addr=vbabka@suse.cz; keydata= xsFNBFZdmxYBEADsw/SiUSjB0dM+vSh95UkgcHjzEVBlby/Fg+g42O7LAEkCYXi/vvq31JTB KxRWDHX0R2tgpFDXHnzZcQywawu8eSq0LxzxFNYMvtB7sV1pxYwej2qx9B75qW2plBs+7+YB 87tMFA+u+L4Z5xAzIimfLD5EKC56kJ1CsXlM8S/LHcmdD9Ctkn3trYDNnat0eoAcfPIP2OZ+ 9oe9IF/R28zmh0ifLXyJQQz5ofdj4bPf8ecEW0rhcqHfTD8k4yK0xxt3xW+6Exqp9n9bydiy tcSAw/TahjW6yrA+6JhSBv1v2tIm+itQc073zjSX8OFL51qQVzRFr7H2UQG33lw2QrvHRXqD Ot7ViKam7v0Ho9wEWiQOOZlHItOOXFphWb2yq3nzrKe45oWoSgkxKb97MVsQ+q2SYjJRBBH4 8qKhphADYxkIP6yut/eaj9ImvRUZZRi0DTc8xfnvHGTjKbJzC2xpFcY0DQbZzuwsIZ8OPJCc LM4S7mT25NE5kUTG/TKQCk922vRdGVMoLA7dIQrgXnRXtyT61sg8PG4wcfOnuWf8577aXP1x 6mzw3/jh3F+oSBHb/GcLC7mvWreJifUL2gEdssGfXhGWBo6zLS3qhgtwjay0Jl+kza1lo+Cv BB2T79D4WGdDuVa4eOrQ02TxqGN7G0Biz5ZLRSFzQSQwLn8fbwARAQABzSBWbGFzdGltaWwg QmFia2EgPHZiYWJrYUBzdXNlLmN6PsLBlAQTAQoAPgIbAwULCQgHAwUVCgkICwUWAgMBAAIe AQIXgBYhBKlA1DSZLC6OmRA9UCJPp+fMgqZkBQJnyBr8BQka0IFQAAoJECJPp+fMgqZkqmMQ AIbGN95ptUMUvo6aAdhxaOCHXp1DfIBuIOK/zpx8ylY4pOwu3GRe4dQ8u4XS9gaZ96Gj4bC+ jwWcSmn+TjtKW3rH1dRKopvC07tSJIGGVyw7ieV/5cbFffA8NL0ILowzVg8w1ipnz1VTkWDr 2zcfslxJsJ6vhXw5/npcY0ldeC1E8f6UUoa4eyoskd70vO0wOAoGd02ZkJoox3F5ODM0kjHu Y97VLOa3GG66lh+ZEelVZEujHfKceCw9G3PMvEzyLFbXvSOigZQMdKzQ8D/OChwqig8wFBmV QCPS4yDdmZP3oeDHRjJ9jvMUKoYODiNKsl2F+xXwyRM2qoKRqFlhCn4usVd1+wmv9iLV8nPs 2Db1ZIa49fJet3Sk3PN4bV1rAPuWvtbuTBN39Q/6MgkLTYHb84HyFKw14Rqe5YorrBLbF3rl M51Dpf6Egu1yTJDHCTEwePWug4XI11FT8lK0LNnHNpbhTCYRjX73iWOnFraJNcURld1jL1nV r/LRD+/e2gNtSTPK0Qkon6HcOBZnxRoqtazTU6YQRmGlT0v+rukj/cn5sToYibWLn+RoV1CE Qj6tApOiHBkpEsCzHGu+iDQ1WT0Idtdynst738f/uCeCMkdRu4WMZjteQaqvARFwCy3P/jpK uvzMtves5HvZw33ZwOtMCgbpce00DaET4y/UzsBNBFsZNTUBCACfQfpSsWJZyi+SHoRdVyX5 J6rI7okc4+b571a7RXD5UhS9dlVRVVAtrU9ANSLqPTQKGVxHrqD39XSw8hxK61pw8p90pg4G /N3iuWEvyt+t0SxDDkClnGsDyRhlUyEWYFEoBrrCizbmahOUwqkJbNMfzj5Y7n7OIJOxNRkB IBOjPdF26dMP69BwePQao1M8Acrrex9sAHYjQGyVmReRjVEtv9iG4DoTsnIR3amKVk6si4Ea X/mrapJqSCcBUVYUFH8M7bsm4CSxier5ofy8jTEa/CfvkqpKThTMCQPNZKY7hke5qEq1CBk2 wxhX48ZrJEFf1v3NuV3OimgsF2odzieNABEBAAHCwXwEGAEKACYCGwwWIQSpQNQ0mSwujpkQ PVAiT6fnzIKmZAUCZ8gcVAUJFhTonwAKCRAiT6fnzIKmZLY8D/9uo3Ut9yi2YCuASWxr7QQZ lJCViArjymbxYB5NdOeC50/0gnhK4pgdHlE2MdwF6o34x7TPFGpjNFvycZqccSQPJ/gibwNA zx3q9vJT4Vw+YbiyS53iSBLXMweeVV1Jd9IjAoL+EqB0cbxoFXvnjkvP1foiiF5r73jCd4PR rD+GoX5BZ7AZmFYmuJYBm28STM2NA6LhT0X+2su16f/HtummENKcMwom0hNu3MBNPUOrujtW khQrWcJNAAsy4yMoJ2Lw51T/5X5Hc7jQ9da9fyqu+phqlVtn70qpPvgWy4HRhr25fCAEXZDp xG4RNmTm+pqorHOqhBkI7wA7P/nyPo7ZEc3L+ZkQ37u0nlOyrjbNUniPGxPxv1imVq8IyycG AN5FaFxtiELK22gvudghLJaDiRBhn8/AhXc642/Z/yIpizE2xG4KU4AXzb6C+o7LX/WmmsWP Ly6jamSg6tvrdo4/e87lUedEqCtrp2o1xpn5zongf6cQkaLZKQcBQnPmgHO5OG8+50u88D9I rywqgzTUhHFKKF6/9L/lYtrNcHU8Z6Y4Ju/MLUiNYkmtrGIMnkjKCiRqlRrZE/v5YFHbayRD dJKXobXTtCBYpLJM4ZYRpGZXne/FAtWNe4KbNJJqxMvrTOrnIatPj8NhBVI0RSJRsbilh6TE m6M14QORSWTLRg== In-Reply-To: <20250523191258.339826-7-ziy@nvidia.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Action: no action X-Stat-Signature: 54ciqak8ptw4dct55s435m8k75faidyc X-Rspamd-Queue-Id: CE1E9100016 X-Rspam-User: X-Rspamd-Server: rspam02 X-HE-Tag: 1748350556-678904 X-HE-Meta: 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 h3eFvrGZ UaSDmRbpL3vHePjxKVms36vVtuvRNGDqqV8Jm/pY0WzIwGEm9i7oXW0w6sMf8on+f1OdtIGcs3uMPsStFeEag4vkvrQ9vHMBzmyovFw81ymDOCPGqWWStt9J55j8h1P19OhUxFEYF6g3Le94S5wAI7pxPd9CPRHO1NcNhJGMCimUMRO/Ab7nwwT/Zgb7Mgo3UPk3u6/f8m/FrK/5AY1iESA2/ODcTrMsMrLfoIQfVe3S+GsMz7KedRn6722u16n8J1ChIDMP8lhQmt/hCxFNWA+96NZOxi5G01UJaLThOkXmT7Z8GPh5Mj80RXKv56Xox/VPOk13H17gj7RzRlGA4AJ0/CiLsgiCjKAkE+fAKkWxKX1I= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 5/23/25 21:12, Zi Yan wrote: > migratetype is no longer overwritten during pageblock isolation, > start_isolate_page_range(), has_unmovable_pages(), and > set_migratetype_isolate() no longer need which migratetype to restore > during isolation failure. > > For has_unmoable_pages(), it needs to know if the isolation is for CMA > allocation, so adding CMA_ALLOCATION to provide the information. At the > same time change isolation flags to enum pb_isolate_mode (MEMORY_OFFLINE, > CMA_ALLOCATION, and ISOLATE_MODE_OTHERS). Remove REPORT_FAILURE and check > MEMORY_OFFLINE instead, since only MEMORY_OFFLINE reports isolation > failures. > > alloc_contig_range() no longer needs migratetype. Replace it with > a newly defined acr_flags_t to tell if an allocation is for CMA. So does > __alloc_contig_migrate_range(). > > Signed-off-by: Zi Yan > --- > drivers/virtio/virtio_mem.c | 3 +- > include/linux/gfp.h | 6 ++- > include/linux/page-isolation.h | 19 ++++++++-- > include/trace/events/kmem.h | 14 ++++--- > mm/cma.c | 2 +- > mm/memory_hotplug.c | 4 +- > mm/page_alloc.c | 25 ++++++------- > mm/page_isolation.c | 67 +++++++++++++++------------------- > 8 files changed, 72 insertions(+), 68 deletions(-) > > diff --git a/drivers/virtio/virtio_mem.c b/drivers/virtio/virtio_mem.c > index 56d0dbe62163..8accc0f255a8 100644 > --- a/drivers/virtio/virtio_mem.c > +++ b/drivers/virtio/virtio_mem.c > @@ -1243,8 +1243,7 @@ static int virtio_mem_fake_offline(struct virtio_mem *vm, unsigned long pfn, > if (atomic_read(&vm->config_changed)) > return -EAGAIN; > > - rc = alloc_contig_range(pfn, pfn + nr_pages, MIGRATE_MOVABLE, > - GFP_KERNEL); > + rc = alloc_contig_range(pfn, pfn + nr_pages, 0, GFP_KERNEL); > if (rc == -ENOMEM) > /* whoops, out of memory */ > return rc; > diff --git a/include/linux/gfp.h b/include/linux/gfp.h > index be160e8d8bcb..dea27ed24f8e 100644 > --- a/include/linux/gfp.h > +++ b/include/linux/gfp.h > @@ -423,9 +423,13 @@ static inline bool gfp_compaction_allowed(gfp_t gfp_mask) > extern gfp_t vma_thp_gfp_mask(struct vm_area_struct *vma); > > #ifdef CONFIG_CONTIG_ALLOC > + > +typedef unsigned int __bitwise acr_flags_t; > +#define ACR_CMA ((__force acr_flags_t)BIT(0)) // allocate for CMA Would it make sense to define ACR_NONE as 0 so it's more descriptive than seeing 0 somewhere? > + > /* The below functions must be run on a range from a single zone. */ > extern int alloc_contig_range_noprof(unsigned long start, unsigned long end, > - unsigned migratetype, gfp_t gfp_mask); > + acr_flags_t alloc_flags, gfp_t gfp_mask); > #define alloc_contig_range(...) alloc_hooks(alloc_contig_range_noprof(__VA_ARGS__)) > > extern struct page *alloc_contig_pages_noprof(unsigned long nr_pages, gfp_t gfp_mask, > diff --git a/include/linux/page-isolation.h b/include/linux/page-isolation.h > index 7a681a49e73c..b61bca909ddc 100644 > --- a/include/linux/page-isolation.h > +++ b/include/linux/page-isolation.h > @@ -38,8 +38,19 @@ static inline void set_pageblock_isolate(struct page *page) > } > #endif > > -#define MEMORY_OFFLINE 0x1 > -#define REPORT_FAILURE 0x2 > +/* > + * Pageblock isolation modes: > + * MEMORY_OFFLINE - isolate to offline (!allocate) memory e.g., skip over > + * PageHWPoison() pages and PageOffline() pages. > + * Unmovable pages will be reported in this mode. > + * CMA_ALLOCATION - isolate for CMA allocations > + * ISOLATE_MODE_OTHERS - isolate for other purposes > + */ > +enum pb_isolate_mode { > + MEMORY_OFFLINE, > + CMA_ALLOCATION, > + ISOLATE_MODE_OTHERS, Since this is in a .h file, I'd prefer more consistent naming, and longer names shouldn't hurt as there are not that many users. Even something like: PB_ISOLATE_MODE_OFFLINE PB_ISOLATE_MODE_CMA PB_ISOLATE_MODE_OTHER ?