* [PATCH v5, part4 31/41] mm/ppc: prepare for removing num_physpages and simplify mem_init() [not found] <1368028298-7401-1-git-send-email-jiang.liu@huawei.com> @ 2013-05-08 15:51 ` Jiang Liu 2013-05-15 0:32 ` Benjamin Herrenschmidt 0 siblings, 1 reply; 3+ messages in thread From: Jiang Liu @ 2013-05-08 15:51 UTC (permalink / raw) To: Andrew Morton Cc: linux-arch, James Bottomley, David Howells, Jiang Liu, Wen Congyang, linux-mm, Mark Salter, linux-kernel, Michal Hocko, Minchan Kim, Paul Mackerras, Mel Gorman, David Rientjes, linuxppc-dev, Sergei Shtylyov, KAMEZAWA Hiroyuki, Jianguo Wu Prepare for removing num_physpages and simplify mem_init(). Signed-off-by: Jiang Liu <jiang.liu@huawei.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org --- arch/powerpc/mm/mem.c | 56 +++++++++++-------------------------------------- 1 file changed, 12 insertions(+), 44 deletions(-) diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index b890245..4e24f1c 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -299,46 +299,27 @@ void __init paging_init(void) void __init mem_init(void) { -#ifdef CONFIG_NEED_MULTIPLE_NODES - int nid; -#endif - pg_data_t *pgdat; - unsigned long i; - struct page *page; - unsigned long reservedpages = 0, codesize, initsize, datasize, bsssize; - #ifdef CONFIG_SWIOTLB swiotlb_init(0); #endif - num_physpages = memblock_phys_mem_size() >> PAGE_SHIFT; high_memory = (void *) __va(max_low_pfn * PAGE_SIZE); #ifdef CONFIG_NEED_MULTIPLE_NODES - for_each_online_node(nid) { - if (NODE_DATA(nid)->node_spanned_pages != 0) { - printk("freeing bootmem node %d\n", nid); - free_all_bootmem_node(NODE_DATA(nid)); - } + { + pg_data_t *pgdat; + + for_each_online_pgdat(pgdat) + if (pgdat->node_spanned_pages != 0) { + printk("freeing bootmem node %d\n", + pgdat->node_id); + free_all_bootmem_node(pgdat); + } } #else max_mapnr = max_pfn; free_all_bootmem(); #endif - for_each_online_pgdat(pgdat) { - for (i = 0; i < pgdat->node_spanned_pages; i++) { - if (!pfn_valid(pgdat->node_start_pfn + i)) - continue; - page = pgdat_page_nr(pgdat, i); - if (PageReserved(page)) - reservedpages++; - } - } - - codesize = (unsigned long)&_sdata - (unsigned long)&_stext; - datasize = (unsigned long)&_edata - (unsigned long)&_sdata; - initsize = (unsigned long)&__init_end - (unsigned long)&__init_begin; - bsssize = (unsigned long)&__bss_stop - (unsigned long)&__bss_start; #ifdef CONFIG_HIGHMEM { @@ -348,13 +329,9 @@ void __init mem_init(void) for (pfn = highmem_mapnr; pfn < max_mapnr; ++pfn) { phys_addr_t paddr = (phys_addr_t)pfn << PAGE_SHIFT; struct page *page = pfn_to_page(pfn); - if (memblock_is_reserved(paddr)) - continue; - free_highmem_page(page); - reservedpages--; + if (!memblock_is_reserved(paddr)) + free_highmem_page(page); } - printk(KERN_DEBUG "High memory: %luk\n", - totalhigh_pages << (PAGE_SHIFT-10)); } #endif /* CONFIG_HIGHMEM */ @@ -367,16 +344,7 @@ void __init mem_init(void) (mfspr(SPRN_TLB1CFG) & TLBnCFG_N_ENTRY) - 1; #endif - printk(KERN_INFO "Memory: %luk/%luk available (%luk kernel code, " - "%luk reserved, %luk data, %luk bss, %luk init)\n", - nr_free_pages() << (PAGE_SHIFT-10), - num_physpages << (PAGE_SHIFT-10), - codesize >> 10, - reservedpages << (PAGE_SHIFT-10), - datasize >> 10, - bsssize >> 10, - initsize >> 10); - + mem_init_print_info(NULL); #ifdef CONFIG_PPC32 pr_info("Kernel virtual memory layout:\n"); pr_info(" * 0x%08lx..0x%08lx : fixmap\n", FIXADDR_START, FIXADDR_TOP); -- 1.7.9.5 ^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH v5, part4 31/41] mm/ppc: prepare for removing num_physpages and simplify mem_init() 2013-05-08 15:51 ` [PATCH v5, part4 31/41] mm/ppc: prepare for removing num_physpages and simplify mem_init() Jiang Liu @ 2013-05-15 0:32 ` Benjamin Herrenschmidt 2013-05-15 15:49 ` Liu Jiang 0 siblings, 1 reply; 3+ messages in thread From: Benjamin Herrenschmidt @ 2013-05-15 0:32 UTC (permalink / raw) To: Jiang Liu Cc: linux-arch, James Bottomley, David Howells, Jiang Liu, Wen Congyang, linux-mm, Mark Salter, linux-kernel, Michal Hocko, Minchan Kim, Paul Mackerras, Mel Gorman, David Rientjes, Andrew Morton, linuxppc-dev, Sergei Shtylyov, KAMEZAWA Hiroyuki, Jianguo Wu On Wed, 2013-05-08 at 23:51 +0800, Jiang Liu wrote: > Prepare for removing num_physpages and simplify mem_init(). No objection, I haven't had a chance to actually build/boot test though. BTW. A recommended way of doing so which is pretty easy even if you don't have access to powerpc hardware nowadays is to use qemu-system-ppc64 with -M pseries. You can find cross compilers for the kernel on kernel.org and you can feed qemu with some distro installer ISO. Cheers, Ben. > Signed-off-by: Jiang Liu <jiang.liu@huawei.com> > Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> > Cc: Paul Mackerras <paulus@samba.org> > Cc: linuxppc-dev@lists.ozlabs.org > Cc: linux-kernel@vger.kernel.org > --- > arch/powerpc/mm/mem.c | 56 +++++++++++-------------------------------------- > 1 file changed, 12 insertions(+), 44 deletions(-) > > diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c > index b890245..4e24f1c 100644 > --- a/arch/powerpc/mm/mem.c > +++ b/arch/powerpc/mm/mem.c > @@ -299,46 +299,27 @@ void __init paging_init(void) > > void __init mem_init(void) > { > -#ifdef CONFIG_NEED_MULTIPLE_NODES > - int nid; > -#endif > - pg_data_t *pgdat; > - unsigned long i; > - struct page *page; > - unsigned long reservedpages = 0, codesize, initsize, datasize, bsssize; > - > #ifdef CONFIG_SWIOTLB > swiotlb_init(0); > #endif > > - num_physpages = memblock_phys_mem_size() >> PAGE_SHIFT; > high_memory = (void *) __va(max_low_pfn * PAGE_SIZE); > > #ifdef CONFIG_NEED_MULTIPLE_NODES > - for_each_online_node(nid) { > - if (NODE_DATA(nid)->node_spanned_pages != 0) { > - printk("freeing bootmem node %d\n", nid); > - free_all_bootmem_node(NODE_DATA(nid)); > - } > + { > + pg_data_t *pgdat; > + > + for_each_online_pgdat(pgdat) > + if (pgdat->node_spanned_pages != 0) { > + printk("freeing bootmem node %d\n", > + pgdat->node_id); > + free_all_bootmem_node(pgdat); > + } > } > #else > max_mapnr = max_pfn; > free_all_bootmem(); > #endif > - for_each_online_pgdat(pgdat) { > - for (i = 0; i < pgdat->node_spanned_pages; i++) { > - if (!pfn_valid(pgdat->node_start_pfn + i)) > - continue; > - page = pgdat_page_nr(pgdat, i); > - if (PageReserved(page)) > - reservedpages++; > - } > - } > - > - codesize = (unsigned long)&_sdata - (unsigned long)&_stext; > - datasize = (unsigned long)&_edata - (unsigned long)&_sdata; > - initsize = (unsigned long)&__init_end - (unsigned long)&__init_begin; > - bsssize = (unsigned long)&__bss_stop - (unsigned long)&__bss_start; > > #ifdef CONFIG_HIGHMEM > { > @@ -348,13 +329,9 @@ void __init mem_init(void) > for (pfn = highmem_mapnr; pfn < max_mapnr; ++pfn) { > phys_addr_t paddr = (phys_addr_t)pfn << PAGE_SHIFT; > struct page *page = pfn_to_page(pfn); > - if (memblock_is_reserved(paddr)) > - continue; > - free_highmem_page(page); > - reservedpages--; > + if (!memblock_is_reserved(paddr)) > + free_highmem_page(page); > } > - printk(KERN_DEBUG "High memory: %luk\n", > - totalhigh_pages << (PAGE_SHIFT-10)); > } > #endif /* CONFIG_HIGHMEM */ > > @@ -367,16 +344,7 @@ void __init mem_init(void) > (mfspr(SPRN_TLB1CFG) & TLBnCFG_N_ENTRY) - 1; > #endif > > - printk(KERN_INFO "Memory: %luk/%luk available (%luk kernel code, " > - "%luk reserved, %luk data, %luk bss, %luk init)\n", > - nr_free_pages() << (PAGE_SHIFT-10), > - num_physpages << (PAGE_SHIFT-10), > - codesize >> 10, > - reservedpages << (PAGE_SHIFT-10), > - datasize >> 10, > - bsssize >> 10, > - initsize >> 10); > - > + mem_init_print_info(NULL); > #ifdef CONFIG_PPC32 > pr_info("Kernel virtual memory layout:\n"); > pr_info(" * 0x%08lx..0x%08lx : fixmap\n", FIXADDR_START, FIXADDR_TOP); ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH v5, part4 31/41] mm/ppc: prepare for removing num_physpages and simplify mem_init() 2013-05-15 0:32 ` Benjamin Herrenschmidt @ 2013-05-15 15:49 ` Liu Jiang 0 siblings, 0 replies; 3+ messages in thread From: Liu Jiang @ 2013-05-15 15:49 UTC (permalink / raw) To: Benjamin Herrenschmidt Cc: linux-arch, James Bottomley, David Howells, Jiang Liu, Wen Congyang, linux-mm, Mark Salter, linux-kernel, Michal Hocko, Minchan Kim, Paul Mackerras, Mel Gorman, David Rientjes, Andrew Morton, linuxppc-dev, Sergei Shtylyov, KAMEZAWA Hiroyuki, Jianguo Wu On Wed 15 May 2013 08:32:34 AM CST, Benjamin Herrenschmidt wrote: > On Wed, 2013-05-08 at 23:51 +0800, Jiang Liu wrote: >> Prepare for removing num_physpages and simplify mem_init(). > > No objection, I haven't had a chance to actually build/boot test though. > > BTW. A recommended way of doing so which is pretty easy even if you > don't have access to powerpc hardware nowadays is to use > qemu-system-ppc64 with -M pseries. > > You can find cross compilers for the kernel on kernel.org and you can > feed qemu with some distro installer ISO. Hi Benjamin,' Thanks for review! As could I assume an "Acked-by"? I have installed all cross-compiler from ftp.kernel.org and done basic building tests for these patches. But I haven't run new kernel with qemu yet, that's a really good suggestion, will try it next time. Regards! Gerry > > Cheers, > Ben. > >> Signed-off-by: Jiang Liu <jiang.liu@huawei.com> >> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> >> Cc: Paul Mackerras <paulus@samba.org> >> Cc: linuxppc-dev@lists.ozlabs.org >> Cc: linux-kernel@vger.kernel.org >> --- >> arch/powerpc/mm/mem.c | 56 +++++++++++-------------------------------------- >> 1 file changed, 12 insertions(+), 44 deletions(-) >> >> diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c >> index b890245..4e24f1c 100644 >> --- a/arch/powerpc/mm/mem.c >> +++ b/arch/powerpc/mm/mem.c >> @@ -299,46 +299,27 @@ void __init paging_init(void) >> >> void __init mem_init(void) >> { >> -#ifdef CONFIG_NEED_MULTIPLE_NODES >> - int nid; >> -#endif >> - pg_data_t *pgdat; >> - unsigned long i; >> - struct page *page; >> - unsigned long reservedpages = 0, codesize, initsize, datasize, bsssize; >> - >> #ifdef CONFIG_SWIOTLB >> swiotlb_init(0); >> #endif >> >> - num_physpages = memblock_phys_mem_size() >> PAGE_SHIFT; >> high_memory = (void *) __va(max_low_pfn * PAGE_SIZE); >> >> #ifdef CONFIG_NEED_MULTIPLE_NODES >> - for_each_online_node(nid) { >> - if (NODE_DATA(nid)->node_spanned_pages != 0) { >> - printk("freeing bootmem node %d\n", nid); >> - free_all_bootmem_node(NODE_DATA(nid)); >> - } >> + { >> + pg_data_t *pgdat; >> + >> + for_each_online_pgdat(pgdat) >> + if (pgdat->node_spanned_pages != 0) { >> + printk("freeing bootmem node %d\n", >> + pgdat->node_id); >> + free_all_bootmem_node(pgdat); >> + } >> } >> #else >> max_mapnr = max_pfn; >> free_all_bootmem(); >> #endif >> - for_each_online_pgdat(pgdat) { >> - for (i = 0; i < pgdat->node_spanned_pages; i++) { >> - if (!pfn_valid(pgdat->node_start_pfn + i)) >> - continue; >> - page = pgdat_page_nr(pgdat, i); >> - if (PageReserved(page)) >> - reservedpages++; >> - } >> - } >> - >> - codesize = (unsigned long)&_sdata - (unsigned long)&_stext; >> - datasize = (unsigned long)&_edata - (unsigned long)&_sdata; >> - initsize = (unsigned long)&__init_end - (unsigned long)&__init_begin; >> - bsssize = (unsigned long)&__bss_stop - (unsigned long)&__bss_start; >> >> #ifdef CONFIG_HIGHMEM >> { >> @@ -348,13 +329,9 @@ void __init mem_init(void) >> for (pfn = highmem_mapnr; pfn < max_mapnr; ++pfn) { >> phys_addr_t paddr = (phys_addr_t)pfn << PAGE_SHIFT; >> struct page *page = pfn_to_page(pfn); >> - if (memblock_is_reserved(paddr)) >> - continue; >> - free_highmem_page(page); >> - reservedpages--; >> + if (!memblock_is_reserved(paddr)) >> + free_highmem_page(page); >> } >> - printk(KERN_DEBUG "High memory: %luk\n", >> - totalhigh_pages << (PAGE_SHIFT-10)); >> } >> #endif /* CONFIG_HIGHMEM */ >> >> @@ -367,16 +344,7 @@ void __init mem_init(void) >> (mfspr(SPRN_TLB1CFG) & TLBnCFG_N_ENTRY) - 1; >> #endif >> >> - printk(KERN_INFO "Memory: %luk/%luk available (%luk kernel code, " >> - "%luk reserved, %luk data, %luk bss, %luk init)\n", >> - nr_free_pages() << (PAGE_SHIFT-10), >> - num_physpages << (PAGE_SHIFT-10), >> - codesize >> 10, >> - reservedpages << (PAGE_SHIFT-10), >> - datasize >> 10, >> - bsssize >> 10, >> - initsize >> 10); >> - >> + mem_init_print_info(NULL); >> #ifdef CONFIG_PPC32 >> pr_info("Kernel virtual memory layout:\n"); >> pr_info(" * 0x%08lx..0x%08lx : fixmap\n", FIXADDR_START, FIXADDR_TOP); > > ^ permalink raw reply [flat|nested] 3+ messages in thread
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2013-05-08 15:51 ` [PATCH v5, part4 31/41] mm/ppc: prepare for removing num_physpages and simplify mem_init() Jiang Liu
2013-05-15 0:32 ` Benjamin Herrenschmidt
2013-05-15 15:49 ` Liu Jiang
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