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8f98435d67
Add tests for memblock_alloc_try_nid for top down allocation direction.
As the definition of this function is pretty close to the core
memblock_alloc_range_nid, the test cases implemented here cover most of
the code paths related to the memory allocations.
The tested scenarios are:
- Region can be allocated within the requested range (both with aligned
and misaligned boundaries)
- Region can be allocated between two already existing entries
- Not enough space between already reserved regions
- Memory range is too narrow but memory can be allocated before
the maximum address
- Edge cases:
+ Minimum address is below memblock_start_of_DRAM()
+ Maximum address is above memblock_end_of_DRAM()
Add checks for both allocation directions:
- Region starts at the min_addr and ends at max_addr
- Maximum address is too close to the beginning of the available
memory
- Memory at the range boundaries is reserved but there is enough space
to allocate a new region
Signed-off-by: Karolina Drobnik <karolinadrobnik@gmail.com>
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Link: https://lore.kernel.org/r/d6c282e0f9f62c15bf74c216214604764232d637.1646055639.git.karolinadrobnik@gmail.com
56 lines
1.7 KiB
Makefile
56 lines
1.7 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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# Memblock simulator requires AddressSanitizer (libasan) and liburcu development
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# packages installed
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CFLAGS += -I. -I../../include -Wall -O2 -fsanitize=address \
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-fsanitize=undefined -D CONFIG_PHYS_ADDR_T_64BIT
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LDFLAGS += -fsanitize=address -fsanitize=undefined
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TARGETS = main
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TEST_OFILES = tests/alloc_nid_api.o tests/alloc_helpers_api.o tests/alloc_api.o \
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tests/basic_api.o tests/common.o
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DEP_OFILES = memblock.o lib/slab.o mmzone.o slab.o
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OFILES = main.o $(DEP_OFILES) $(TEST_OFILES)
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EXTR_SRC = ../../../mm/memblock.c
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ifeq ($(BUILD), 32)
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CFLAGS += -m32
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LDFLAGS += -m32
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endif
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# Process user parameters
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include scripts/Makefile.include
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main: $(OFILES)
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$(OFILES): include
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include: ../../../include/linux/memblock.h ../../include/linux/*.h \
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../../include/asm/*.h
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@mkdir -p linux
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test -L linux/memblock.h || ln -s ../../../../include/linux/memblock.h linux/memblock.h
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test -L asm/cmpxchg.h || ln -s ../../../arch/x86/include/asm/cmpxchg.h asm/cmpxchg.h
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memblock.c: $(EXTR_SRC)
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test -L memblock.c || ln -s $(EXTR_SRC) memblock.c
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clean:
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$(RM) $(TARGETS) $(OFILES) linux/memblock.h memblock.c asm/cmpxchg.h
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help:
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@echo 'Memblock simulator'
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@echo ''
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@echo 'Available targets:'
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@echo ' main - Build the memblock simulator'
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@echo ' clean - Remove generated files and symlinks in the directory'
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@echo ''
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@echo 'Configuration:'
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@echo ' make NUMA=1 - simulate enabled NUMA'
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@echo ' make MOVABLE_NODE=1 - override `movable_node_is_enabled`'
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@echo ' definition to simulate movable NUMA nodes'
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@echo ' make 32BIT_PHYS_ADDR_T=1 - Use 32 bit physical addresses'
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vpath %.c ../../lib
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.PHONY: clean include help
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