diff options
Diffstat (limited to 'nixos/modules/kernel-patches/0033-mm-Fix-alloc_node_mem_map-with-ARCH_PFN_OFFSET-calcu.patch')
| -rw-r--r-- | nixos/modules/kernel-patches/0033-mm-Fix-alloc_node_mem_map-with-ARCH_PFN_OFFSET-calcu.patch | 92 |
1 files changed, 0 insertions, 92 deletions
diff --git a/nixos/modules/kernel-patches/0033-mm-Fix-alloc_node_mem_map-with-ARCH_PFN_OFFSET-calcu.patch b/nixos/modules/kernel-patches/0033-mm-Fix-alloc_node_mem_map-with-ARCH_PFN_OFFSET-calcu.patch deleted file mode 100644 index 55aa1d6..0000000 --- a/nixos/modules/kernel-patches/0033-mm-Fix-alloc_node_mem_map-with-ARCH_PFN_OFFSET-calcu.patch +++ /dev/null @@ -1,92 +0,0 @@ -From 4818a6d22f2ca39d148608e365209978a2be8c24 Mon Sep 17 00:00:00 2001 -From: Tobias Wolf <dev-NTEO@vplace.de> -Date: Tue, 27 Sep 2022 16:21:21 +0200 -Subject: [PATCH 33/96] mm: Fix alloc_node_mem_map with ARCH_PFN_OFFSET - calculation - -An rt288x (ralink) based router (Belkin F5D8235 v1) does not boot with any -kernel beyond version 4.3 resulting in: - -BUG: Bad page state in process swapper pfn:086ac - -bisect resulted in: - -a1c34a3bf00af2cede839879502e12dc68491ad5 is the first bad commit -commit a1c34a3bf00af2cede839879502e12dc68491ad5 -Author: Laura Abbott <laura@labbott.name> -Date: Thu Nov 5 18:48:46 2015 -0800 - - mm: Don't offset memmap for flatmem - - Srinivas Kandagatla reported bad page messages when trying to remove the - bottom 2MB on an ARM based IFC6410 board - - BUG: Bad page state in process swapper pfn:fffa8 - page:ef7fb500 count:0 mapcount:0 mapping: (null) index:0x0 - flags: 0x96640253(locked|error|dirty|active|arch_1|reclaim|mlocked) - page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set - bad because of flags: - flags: 0x200041(locked|active|mlocked) - Modules linked in: - CPU: 0 PID: 0 Comm: swapper Not tainted 3.19.0-rc3-00007-g412f9ba-dirty -#816 - Hardware name: Qualcomm (Flattened Device Tree) - unwind_backtrace - show_stack - dump_stack - bad_page - free_pages_prepare - free_hot_cold_page - __free_pages - free_highmem_page - mem_init - start_kernel - Disabling lock debugging due to kernel taint - [...] -:040000 040000 2de013c372345fd471cd58f0553c9b38b0ef1cc4 -0a8156f848733dfa21e16c196dfb6c0a76290709 M mm - -This fix for ARM does not account ARCH_PFN_OFFSET for mem_map as later used by -page_to_pfn anymore. - -The following output was generated with two hacked in printk statements: - -printk("before %p vs. %p or %p\n", mem_map, mem_map - offset, mem_map - -(pgdat->node_start_pfn - ARCH_PFN_OFFSET)); - if (page_to_pfn(mem_map) != pgdat->node_start_pfn) - mem_map -= offset + (pgdat->node_start_pfn - ARCH_PFN_OFFSET); -printk("after %p\n", mem_map); - -Output: - -[ 0.000000] before 8861b280 vs. 8861b280 or 8851b280 -[ 0.000000] after 8851b280 - -As seen in the first line mem_map with subtraction of offset does not equal the -mem_map after subtraction of ARCH_PFN_OFFSET. - -After adding the offset of ARCH_PFN_OFFSET as well to mem_map as the -previously calculated offset is zero for the named platform it is able to boot -4.4 and 4.9-rc7 again. - -Signed-off-by: Tobias Wolf <dev-NTEO@vplace.de> ---- - mm/page_alloc.c | 2 +- - 1 file changed, 1 insertion(+), 1 deletion(-) - -diff --git a/mm/page_alloc.c b/mm/page_alloc.c -index cdf0e7d707c3..f3a69976b0b2 100644 ---- a/mm/page_alloc.c -+++ b/mm/page_alloc.c -@@ -7698,7 +7698,7 @@ static void __init alloc_node_mem_map(struct pglist_data *pgdat) - if (pgdat == NODE_DATA(0)) { - mem_map = NODE_DATA(0)->node_mem_map; - if (page_to_pfn(mem_map) != pgdat->node_start_pfn) -- mem_map -= offset; -+ mem_map -= offset + (pgdat->node_start_pfn - ARCH_PFN_OFFSET); - } - #endif - } --- -2.37.2 - |