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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>
8 lines
202 B
C
8 lines
202 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _PARISC_MMZONE_H
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#define _PARISC_MMZONE_H
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#define MAX_PHYSMEM_RANGES 4 /* Fix the size for now (current known max is 3) */
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#endif /* _PARISC_MMZONE_H */
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