From: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> To: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com> Cc: <akpm@linux-foundation.org>, <mgorman@suse.de>, <hannes@cmpxchg.org>, <tony.luck@intel.com>, <matthew.garrett@nebula.com>, <dave@sr71.net>, <riel@redhat.com>, <arjan@linux.intel.com>, <srinivas.pandruvada@linux.intel.com>, <willy@linux.intel.com>, <kamezawa.hiroyu@jp.fujitsu.com>, <lenb@kernel.org>, <rjw@sisk.pl>, <gargankita@gmail.com>, <paulmck@linux.vnet.ibm.com>, <svaidy@linux.vnet.ibm.com>, <andi@firstfloor.org>, <santosh.shilimkar@ti.com>, <kosaki.motohiro@gmail.com>, <linux-pm@vger.kernel.org>, <linux-mm@kvack.org>, <linux-kernel@vger.kernel.org> Subject: Re: [RFC PATCH v3 04/35] mm: Initialize node memory regions during boot Date: Mon, 2 Sep 2013 15:20:13 +0900 [thread overview] Message-ID: <52242E1D.4020406@jp.fujitsu.com> (raw) In-Reply-To: <20130830131504.4947.86008.stgit@srivatsabhat.in.ibm.com> (2013/08/30 22:15), Srivatsa S. Bhat wrote: > Initialize the node's memory-regions structures with the information about > the region-boundaries, at boot time. > > Based-on-patch-by: Ankita Garg <gargankita@gmail.com> > Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> > --- > > include/linux/mm.h | 4 ++++ > mm/page_alloc.c | 28 ++++++++++++++++++++++++++++ > 2 files changed, 32 insertions(+) > > diff --git a/include/linux/mm.h b/include/linux/mm.h > index f022460..18fdec4 100644 > --- a/include/linux/mm.h > +++ b/include/linux/mm.h > @@ -627,6 +627,10 @@ static inline pte_t maybe_mkwrite(pte_t pte, struct vm_area_struct *vma) > #define LAST_NID_MASK ((1UL << LAST_NID_WIDTH) - 1) > #define ZONEID_MASK ((1UL << ZONEID_SHIFT) - 1) > > +/* Hard-code memory region size to be 512 MB for now. */ > +#define MEM_REGION_SHIFT (29 - PAGE_SHIFT) > +#define MEM_REGION_SIZE (1UL << MEM_REGION_SHIFT) > + > static inline enum zone_type page_zonenum(const struct page *page) > { > return (page->flags >> ZONES_PGSHIFT) & ZONES_MASK; > diff --git a/mm/page_alloc.c b/mm/page_alloc.c > index b86d7e3..bb2d5d4 100644 > --- a/mm/page_alloc.c > +++ b/mm/page_alloc.c > @@ -4809,6 +4809,33 @@ static void __init_refok alloc_node_mem_map(struct pglist_data *pgdat) > #endif /* CONFIG_FLAT_NODE_MEM_MAP */ > } > > +static void __meminit init_node_memory_regions(struct pglist_data *pgdat) > +{ > + int nid = pgdat->node_id; > + unsigned long start_pfn = pgdat->node_start_pfn; > + unsigned long end_pfn = start_pfn + pgdat->node_spanned_pages; > + struct node_mem_region *region; > + unsigned long i, absent; > + int idx; > + > + for (i = start_pfn, idx = 0; i < end_pfn; > + i += region->spanned_pages, idx++) { > + > + region = &pgdat->node_regions[idx]; It seems that overflow easily occurs. node_regions[] has 256 entries and MEM_REGION_SIZE is 512MiB. So if the pgdat has more than 128 GiB, overflow will occur. Am I wrong? Thanks, Yasuaki Ishimatsu > + region->pgdat = pgdat; > + region->start_pfn = i; > + region->spanned_pages = min(MEM_REGION_SIZE, end_pfn - i); > + region->end_pfn = region->start_pfn + region->spanned_pages; > + > + absent = __absent_pages_in_range(nid, region->start_pfn, > + region->end_pfn); > + > + region->present_pages = region->spanned_pages - absent; > + } > + > + pgdat->nr_node_regions = idx; > +} > + > void __paginginit free_area_init_node(int nid, unsigned long *zones_size, > unsigned long node_start_pfn, unsigned long *zholes_size) > { > @@ -4837,6 +4864,7 @@ void __paginginit free_area_init_node(int nid, unsigned long *zones_size, > > free_area_init_core(pgdat, start_pfn, end_pfn, > zones_size, zholes_size); > + init_node_memory_regions(pgdat); > } > > #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP >
WARNING: multiple messages have this Message-ID (diff)
From: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> To: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com> Cc: akpm@linux-foundation.org, mgorman@suse.de, hannes@cmpxchg.org, tony.luck@intel.com, matthew.garrett@nebula.com, dave@sr71.net, riel@redhat.com, arjan@linux.intel.com, srinivas.pandruvada@linux.intel.com, willy@linux.intel.com, kamezawa.hiroyu@jp.fujitsu.com, lenb@kernel.org, rjw@sisk.pl, gargankita@gmail.com, paulmck@linux.vnet.ibm.com, svaidy@linux.vnet.ibm.com, andi@firstfloor.org, santosh.shilimkar@ti.com, kosaki.motohiro@gmail.com, linux-pm@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [RFC PATCH v3 04/35] mm: Initialize node memory regions during boot Date: Mon, 2 Sep 2013 15:20:13 +0900 [thread overview] Message-ID: <52242E1D.4020406@jp.fujitsu.com> (raw) In-Reply-To: <20130830131504.4947.86008.stgit@srivatsabhat.in.ibm.com> (2013/08/30 22:15), Srivatsa S. Bhat wrote: > Initialize the node's memory-regions structures with the information about > the region-boundaries, at boot time. > > Based-on-patch-by: Ankita Garg <gargankita@gmail.com> > Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> > --- > > include/linux/mm.h | 4 ++++ > mm/page_alloc.c | 28 ++++++++++++++++++++++++++++ > 2 files changed, 32 insertions(+) > > diff --git a/include/linux/mm.h b/include/linux/mm.h > index f022460..18fdec4 100644 > --- a/include/linux/mm.h > +++ b/include/linux/mm.h > @@ -627,6 +627,10 @@ static inline pte_t maybe_mkwrite(pte_t pte, struct vm_area_struct *vma) > #define LAST_NID_MASK ((1UL << LAST_NID_WIDTH) - 1) > #define ZONEID_MASK ((1UL << ZONEID_SHIFT) - 1) > > +/* Hard-code memory region size to be 512 MB for now. */ > +#define MEM_REGION_SHIFT (29 - PAGE_SHIFT) > +#define MEM_REGION_SIZE (1UL << MEM_REGION_SHIFT) > + > static inline enum zone_type page_zonenum(const struct page *page) > { > return (page->flags >> ZONES_PGSHIFT) & ZONES_MASK; > diff --git a/mm/page_alloc.c b/mm/page_alloc.c > index b86d7e3..bb2d5d4 100644 > --- a/mm/page_alloc.c > +++ b/mm/page_alloc.c > @@ -4809,6 +4809,33 @@ static void __init_refok alloc_node_mem_map(struct pglist_data *pgdat) > #endif /* CONFIG_FLAT_NODE_MEM_MAP */ > } > > +static void __meminit init_node_memory_regions(struct pglist_data *pgdat) > +{ > + int nid = pgdat->node_id; > + unsigned long start_pfn = pgdat->node_start_pfn; > + unsigned long end_pfn = start_pfn + pgdat->node_spanned_pages; > + struct node_mem_region *region; > + unsigned long i, absent; > + int idx; > + > + for (i = start_pfn, idx = 0; i < end_pfn; > + i += region->spanned_pages, idx++) { > + > + region = &pgdat->node_regions[idx]; It seems that overflow easily occurs. node_regions[] has 256 entries and MEM_REGION_SIZE is 512MiB. So if the pgdat has more than 128 GiB, overflow will occur. Am I wrong? Thanks, Yasuaki Ishimatsu > + region->pgdat = pgdat; > + region->start_pfn = i; > + region->spanned_pages = min(MEM_REGION_SIZE, end_pfn - i); > + region->end_pfn = region->start_pfn + region->spanned_pages; > + > + absent = __absent_pages_in_range(nid, region->start_pfn, > + region->end_pfn); > + > + region->present_pages = region->spanned_pages - absent; > + } > + > + pgdat->nr_node_regions = idx; > +} > + > void __paginginit free_area_init_node(int nid, unsigned long *zones_size, > unsigned long node_start_pfn, unsigned long *zholes_size) > { > @@ -4837,6 +4864,7 @@ void __paginginit free_area_init_node(int nid, unsigned long *zones_size, > > free_area_init_core(pgdat, start_pfn, end_pfn, > zones_size, zholes_size); > + init_node_memory_regions(pgdat); > } > > #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2013-09-02 6:21 UTC|newest] Thread overview: 102+ messages / expand[flat|nested] mbox.gz Atom feed top 2013-08-30 13:13 [RESEND RFC PATCH v3 00/35] mm: Memory Power Management Srivatsa S. Bhat 2013-08-30 13:13 ` Srivatsa S. Bhat 2013-08-30 13:14 ` [RFC PATCH v3 01/35] mm: Restructure free-page stealing code and fix a bug Srivatsa S. Bhat 2013-08-30 13:14 ` Srivatsa S. Bhat 2013-08-30 13:14 ` [RFC PATCH v3 02/35] mm: Fix the value of fallback_migratetype in alloc_extfrag tracepoint Srivatsa S. Bhat 2013-08-30 13:14 ` Srivatsa S. Bhat 2013-08-30 13:14 ` [RFC PATCH v3 03/35] mm: Introduce memory regions data-structure to capture region boundaries within nodes Srivatsa S. Bhat 2013-08-30 13:14 ` Srivatsa S. Bhat 2013-08-30 13:15 ` [RFC PATCH v3 04/35] mm: Initialize node memory regions during boot Srivatsa S. Bhat 2013-08-30 13:15 ` Srivatsa S. Bhat 2013-09-02 6:20 ` Yasuaki Ishimatsu [this message] 2013-09-02 6:20 ` Yasuaki Ishimatsu 2013-09-02 17:43 ` Srivatsa S. Bhat 2013-09-02 17:43 ` Srivatsa S. Bhat 2013-09-03 4:53 ` Yasuaki Ishimatsu 2013-09-03 4:53 ` Yasuaki Ishimatsu 2013-08-30 13:15 ` [RFC PATCH v3 05/35] mm: Introduce and initialize zone memory regions Srivatsa S. Bhat 2013-08-30 13:15 ` Srivatsa S. Bhat 2013-08-30 13:15 ` [RFC PATCH v3 06/35] mm: Add helpers to retrieve node region and zone region for a given page Srivatsa S. Bhat 2013-08-30 13:15 ` Srivatsa S. Bhat 2013-09-03 5:56 ` Yasuaki Ishimatsu 2013-09-03 5:56 ` Yasuaki Ishimatsu 2013-09-03 5:56 ` Yasuaki Ishimatsu 2013-09-03 8:34 ` Srivatsa S. Bhat 2013-09-03 8:34 ` Srivatsa S. Bhat 2013-08-30 13:16 ` [RFC PATCH v3 07/35] mm: Add data-structures to describe memory regions within the zones' freelists Srivatsa S. Bhat 2013-08-30 13:16 ` Srivatsa S. Bhat 2013-08-30 13:16 ` [RFC PATCH v3 08/35] mm: Demarcate and maintain pageblocks in region-order in " Srivatsa S. Bhat 2013-08-30 13:16 ` Srivatsa S. Bhat 2013-09-04 7:49 ` Yasuaki Ishimatsu 2013-09-04 7:49 ` Yasuaki Ishimatsu 2013-09-04 7:49 ` Yasuaki Ishimatsu 2013-08-30 13:16 ` [RFC PATCH v3 09/35] mm: Track the freepage migratetype of pages accurately Srivatsa S. Bhat 2013-08-30 13:16 ` Srivatsa S. Bhat 2013-09-03 6:38 ` Yasuaki Ishimatsu 2013-09-03 6:38 ` Yasuaki Ishimatsu 2013-09-03 8:45 ` Srivatsa S. Bhat 2013-09-03 8:45 ` Srivatsa S. Bhat 2013-09-04 8:23 ` Yasuaki Ishimatsu 2013-09-04 8:23 ` Yasuaki Ishimatsu 2013-09-06 5:24 ` Srivatsa S. Bhat 2013-09-06 5:24 ` Srivatsa S. Bhat 2013-08-30 13:16 ` [RFC PATCH v3 10/35] mm: Use the correct migratetype during buddy merging Srivatsa S. Bhat 2013-08-30 13:16 ` Srivatsa S. Bhat 2013-08-30 13:17 ` [RFC PATCH v3 11/35] mm: Add an optimized version of del_from_freelist to keep page allocation fast Srivatsa S. Bhat 2013-08-30 13:17 ` Srivatsa S. Bhat 2013-08-30 13:17 ` [RFC PATCH v3 12/35] bitops: Document the difference in indexing between fls() and __fls() Srivatsa S. Bhat 2013-08-30 13:17 ` Srivatsa S. Bhat 2013-08-30 13:17 ` [RFC PATCH v3 13/35] mm: A new optimized O(log n) sorting algo to speed up buddy-sorting Srivatsa S. Bhat 2013-08-30 13:17 ` Srivatsa S. Bhat 2013-08-30 13:18 ` [RFC PATCH v3 14/35] mm: Add support to accurately track per-memory-region allocation Srivatsa S. Bhat 2013-08-30 13:18 ` Srivatsa S. Bhat 2013-08-30 13:18 ` [RFC PATCH v3 15/35] mm: Print memory region statistics to understand the buddy allocator behavior Srivatsa S. Bhat 2013-08-30 13:18 ` Srivatsa S. Bhat 2013-08-30 13:18 ` [RFC PATCH v3 16/35] mm: Enable per-memory-region fragmentation stats in pagetypeinfo Srivatsa S. Bhat 2013-08-30 13:18 ` Srivatsa S. Bhat 2013-08-30 13:19 ` [RFC PATCH v3 17/35] mm: Add aggressive bias to prefer lower regions during page allocation Srivatsa S. Bhat 2013-08-30 13:19 ` Srivatsa S. Bhat 2013-08-30 13:19 ` [RFC PATCH v3 18/35] mm: Introduce a "Region Allocator" to manage entire memory regions Srivatsa S. Bhat 2013-08-30 13:19 ` Srivatsa S. Bhat 2013-08-30 13:19 ` [RFC PATCH v3 19/35] mm: Add a mechanism to add pages to buddy freelists in bulk Srivatsa S. Bhat 2013-08-30 13:19 ` Srivatsa S. Bhat 2013-08-30 13:20 ` [RFC PATCH v3 20/35] mm: Provide a mechanism to delete pages from " Srivatsa S. Bhat 2013-08-30 13:20 ` Srivatsa S. Bhat 2013-08-30 13:20 ` [RFC PATCH v3 21/35] mm: Provide a mechanism to release free memory to the region allocator Srivatsa S. Bhat 2013-08-30 13:20 ` Srivatsa S. Bhat 2013-08-30 13:20 ` [RFC PATCH v3 22/35] mm: Provide a mechanism to request free memory from " Srivatsa S. Bhat 2013-08-30 13:20 ` Srivatsa S. Bhat 2013-08-30 13:21 ` [RFC PATCH v3 23/35] mm: Maintain the counter for freepages in " Srivatsa S. Bhat 2013-08-30 13:21 ` Srivatsa S. Bhat 2013-08-30 13:21 ` [RFC PATCH v3 24/35] mm: Propagate the sorted-buddy bias for picking free regions, to " Srivatsa S. Bhat 2013-08-30 13:21 ` Srivatsa S. Bhat 2013-08-30 13:21 ` [RFC PATCH v3 25/35] mm: Fix vmstat to also account for freepages in the " Srivatsa S. Bhat 2013-08-30 13:21 ` Srivatsa S. Bhat 2013-08-30 13:22 ` [RFC PATCH v3 26/35] mm: Drop some very expensive sorted-buddy related checks under DEBUG_PAGEALLOC Srivatsa S. Bhat 2013-08-30 13:22 ` Srivatsa S. Bhat 2013-08-30 13:22 ` [RFC PATCH v3 27/35] mm: Connect Page Allocator(PA) to Region Allocator(RA); add PA => RA flow Srivatsa S. Bhat 2013-08-30 13:22 ` Srivatsa S. Bhat 2013-08-30 13:22 ` [RFC PATCH v3 28/35] mm: Connect Page Allocator(PA) to Region Allocator(RA); add PA <= " Srivatsa S. Bhat 2013-08-30 13:22 ` Srivatsa S. Bhat 2013-08-30 13:23 ` [RFC PATCH v3 29/35] mm: Update the freepage migratetype of pages during region allocation Srivatsa S. Bhat 2013-08-30 13:23 ` Srivatsa S. Bhat 2013-08-30 13:23 ` [RFC PATCH v3 30/35] mm: Provide a mechanism to check if a given page is in the region allocator Srivatsa S. Bhat 2013-08-30 13:23 ` Srivatsa S. Bhat 2013-08-30 13:23 ` [RFC PATCH v3 31/35] mm: Add a way to request pages of a particular region from " Srivatsa S. Bhat 2013-08-30 13:23 ` Srivatsa S. Bhat 2013-08-30 13:24 ` [RFC PATCH v3 32/35] mm: Modify move_freepages() to handle pages in the region allocator properly Srivatsa S. Bhat 2013-08-30 13:24 ` Srivatsa S. Bhat 2013-08-30 13:24 ` [RFC PATCH v3 33/35] mm: Never change migratetypes of pageblocks during freepage stealing Srivatsa S. Bhat 2013-08-30 13:24 ` Srivatsa S. Bhat 2013-08-30 13:24 ` [RFC PATCH v3 34/35] mm: Set pageblock migratetype when allocating regions from region allocator Srivatsa S. Bhat 2013-08-30 13:24 ` Srivatsa S. Bhat 2013-08-30 13:24 ` [RFC PATCH v3 35/35] mm: Use a cache between page-allocator and region-allocator Srivatsa S. Bhat 2013-08-30 13:24 ` Srivatsa S. Bhat 2013-08-30 13:26 ` [RESEND RFC PATCH v3 00/35] mm: Memory Power Management Srivatsa S. Bhat 2013-08-30 13:26 ` Srivatsa S. Bhat 2013-08-30 15:27 ` Dave Hansen 2013-08-30 15:27 ` Dave Hansen 2013-08-30 17:50 ` Srivatsa S. Bhat 2013-08-30 17:50 ` Srivatsa S. Bhat -- strict thread matches above, loose matches on Subject: below -- 2013-08-30 12:33 [RFC " Srivatsa S. Bhat 2013-08-30 12:34 ` [RFC PATCH v3 04/35] mm: Initialize node memory regions during boot Srivatsa S. Bhat 2013-08-30 12:34 ` Srivatsa S. Bhat
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=52242E1D.4020406@jp.fujitsu.com \ --to=isimatu.yasuaki@jp.fujitsu.com \ --cc=akpm@linux-foundation.org \ --cc=andi@firstfloor.org \ --cc=arjan@linux.intel.com \ --cc=dave@sr71.net \ --cc=gargankita@gmail.com \ --cc=hannes@cmpxchg.org \ --cc=kamezawa.hiroyu@jp.fujitsu.com \ --cc=kosaki.motohiro@gmail.com \ --cc=lenb@kernel.org \ --cc=linux-kernel@vger.kernel.org \ --cc=linux-mm@kvack.org \ --cc=linux-pm@vger.kernel.org \ --cc=matthew.garrett@nebula.com \ --cc=mgorman@suse.de \ --cc=paulmck@linux.vnet.ibm.com \ --cc=riel@redhat.com \ --cc=rjw@sisk.pl \ --cc=santosh.shilimkar@ti.com \ --cc=srinivas.pandruvada@linux.intel.com \ --cc=srivatsa.bhat@linux.vnet.ibm.com \ --cc=svaidy@linux.vnet.ibm.com \ --cc=tony.luck@intel.com \ --cc=willy@linux.intel.com \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.