mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-25 20:25:31 +07:00
dbdf076099
The commit1c30844d2d("mm: reclaim small amounts of memory when an external fragmentation event occurs") breaks memory management on a parisc c8000 workstation with this memory layout: 0) Start 0x0000000000000000 End 0x000000003fffffff Size 1024 MB 1) Start 0x0000000100000000 End 0x00000001bfdfffff Size 3070 MB 2) Start 0x0000004040000000 End 0x00000040ffffffff Size 3072 MB With the patch1c30844d2d, the kernel will incorrectly reclaim the first zone when it fills up, ignoring the fact that there are two completely free zones. Basiscally, it limits cache size to 1GiB. The parisc kernel is currently using the DISCONTIGMEM implementation, but isn't NUMA. Avoid this issue or strange work-arounds by switching to the more commonly used SPARSEMEM implementation. Reported-by: Mikulas Patocka <mpatocka@redhat.com> Fixes:1c30844d2d("mm: reclaim small amounts of memory when an external fragmentation event occurs") Signed-off-by: Helge Deller <deller@gmx.de>
149 lines
4.0 KiB
C
149 lines
4.0 KiB
C
/*
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* Architecture-specific kernel symbols
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*
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* Copyright (C) 2000-2001 Richard Hirst <rhirst with parisc-linux.org>
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* Copyright (C) 2001 Dave Kennedy
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* Copyright (C) 2001 Paul Bame <bame at parisc-linux.org>
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* Copyright (C) 2001-2003 Grant Grundler <grundler with parisc-linux.org>
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* Copyright (C) 2002-2003 Matthew Wilcox <willy at parisc-linux.org>
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* Copyright (C) 2002 Randolph Chung <tausq at parisc-linux.org>
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* Copyright (C) 2002-2007 Helge Deller <deller with parisc-linux.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/syscalls.h>
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#include <linux/string.h>
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EXPORT_SYMBOL(memset);
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#include <linux/atomic.h>
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EXPORT_SYMBOL(__xchg8);
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EXPORT_SYMBOL(__xchg32);
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EXPORT_SYMBOL(__cmpxchg_u32);
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EXPORT_SYMBOL(__cmpxchg_u64);
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#ifdef CONFIG_SMP
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EXPORT_SYMBOL(__atomic_hash);
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#endif
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#ifdef CONFIG_64BIT
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EXPORT_SYMBOL(__xchg64);
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#endif
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#include <linux/uaccess.h>
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EXPORT_SYMBOL(lclear_user);
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EXPORT_SYMBOL(lstrnlen_user);
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#ifndef CONFIG_64BIT
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/* Needed so insmod can set dp value */
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extern int $global$;
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EXPORT_SYMBOL($global$);
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#endif
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#include <asm/io.h>
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EXPORT_SYMBOL(memcpy_toio);
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EXPORT_SYMBOL(memcpy_fromio);
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EXPORT_SYMBOL(memset_io);
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extern void $$divI(void);
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extern void $$divU(void);
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extern void $$remI(void);
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extern void $$remU(void);
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extern void $$mulI(void);
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extern void $$divU_3(void);
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extern void $$divU_5(void);
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extern void $$divU_6(void);
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extern void $$divU_9(void);
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extern void $$divU_10(void);
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extern void $$divU_12(void);
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extern void $$divU_7(void);
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extern void $$divU_14(void);
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extern void $$divU_15(void);
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extern void $$divI_3(void);
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extern void $$divI_5(void);
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extern void $$divI_6(void);
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extern void $$divI_7(void);
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extern void $$divI_9(void);
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extern void $$divI_10(void);
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extern void $$divI_12(void);
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extern void $$divI_14(void);
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extern void $$divI_15(void);
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EXPORT_SYMBOL($$divI);
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EXPORT_SYMBOL($$divU);
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EXPORT_SYMBOL($$remI);
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EXPORT_SYMBOL($$remU);
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EXPORT_SYMBOL($$mulI);
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EXPORT_SYMBOL($$divU_3);
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EXPORT_SYMBOL($$divU_5);
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EXPORT_SYMBOL($$divU_6);
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EXPORT_SYMBOL($$divU_9);
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EXPORT_SYMBOL($$divU_10);
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EXPORT_SYMBOL($$divU_12);
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EXPORT_SYMBOL($$divU_7);
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EXPORT_SYMBOL($$divU_14);
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EXPORT_SYMBOL($$divU_15);
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EXPORT_SYMBOL($$divI_3);
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EXPORT_SYMBOL($$divI_5);
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EXPORT_SYMBOL($$divI_6);
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EXPORT_SYMBOL($$divI_7);
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EXPORT_SYMBOL($$divI_9);
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EXPORT_SYMBOL($$divI_10);
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EXPORT_SYMBOL($$divI_12);
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EXPORT_SYMBOL($$divI_14);
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EXPORT_SYMBOL($$divI_15);
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extern void __ashrdi3(void);
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extern void __ashldi3(void);
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extern void __lshrdi3(void);
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extern void __muldi3(void);
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extern void __ucmpdi2(void);
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EXPORT_SYMBOL(__ashrdi3);
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EXPORT_SYMBOL(__ashldi3);
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EXPORT_SYMBOL(__lshrdi3);
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EXPORT_SYMBOL(__muldi3);
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EXPORT_SYMBOL(__ucmpdi2);
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asmlinkage void * __canonicalize_funcptr_for_compare(void *);
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EXPORT_SYMBOL(__canonicalize_funcptr_for_compare);
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#ifdef CONFIG_64BIT
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extern void __divdi3(void);
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extern void __udivdi3(void);
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extern void __umoddi3(void);
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extern void __moddi3(void);
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EXPORT_SYMBOL(__divdi3);
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EXPORT_SYMBOL(__udivdi3);
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EXPORT_SYMBOL(__umoddi3);
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EXPORT_SYMBOL(__moddi3);
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#endif
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#ifndef CONFIG_64BIT
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extern void $$dyncall(void);
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EXPORT_SYMBOL($$dyncall);
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#endif
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#ifdef CONFIG_FUNCTION_TRACER
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extern void _mcount(void);
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EXPORT_SYMBOL(_mcount);
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#endif
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/* from pacache.S -- needed for clear/copy_page */
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EXPORT_SYMBOL(clear_page_asm);
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EXPORT_SYMBOL(copy_page_asm);
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