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Commit 54283aed authored by Linus Torvalds's avatar Linus Torvalds
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Merge tag 'linux-kselftest-4.3-rc1' of... 

Merge tag 'linux-kselftest-4.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull kselftest update from Shuah Khan:
 "This update adds new zram test and fixes to problems found during
  testing this new zram test.  In addition, there are a few bug fixes
  and ksefltest improvement patches from Linaro developers.

  I will send another update later on this week to fix kselftest
  breakage due to commit 2bf9e0ab ("locking/static_keys: Provide a
  selftest") after the fix soaks in next for a couple of days"

* tag 'linux-kselftest-4.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  selftests/zram: Makefile fix
  selftests/zram: must be run as root
  selftests: breakpoints: fix installing error on the architecture except x86
  selftests: check before install
  selftests/zram: Adding zram tests
parents 9a9952bb 7eba7d90

tools/testing/selftests/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ TARGETS += user 
TARGETS += jumplabel

TARGETS += vm

TARGETS += x86

TARGETS += zram

#Please keep the TARGETS list alphabetically sorted

# Run "make quicktest=1 run_tests" or

# "make quicktest=1 kselftest from top level Makefile
@@ -72,7 +73,6 @@ ifdef INSTALL_PATH 
	@# Ask all targets to install their files

	mkdir -p $(INSTALL_PATH)

	for TARGET in $(TARGETS); do \

		mkdir -p $(INSTALL_PATH)/$$TARGET ; \

		make -C $$TARGET INSTALL_PATH=$(INSTALL_PATH)/$$TARGET install; \

	done;

tools/testing/selftests/breakpoints/Makefile

+3 −13
Original line number Diff line number Diff line 
# Taken from perf makefile

uname_M := $(shell uname -m 2>/dev/null || echo not)

ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/i386/)

ifeq ($(ARCH),i386)

        ARCH := x86

endif

ifeq ($(ARCH),x86_64)

	ARCH := x86

endif

ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/x86/ -e s/x86_64/x86/)





all:

ifeq ($(ARCH),x86)

	gcc breakpoint_test.c -o breakpoint_test

else

	echo "Not an x86 target, can't build breakpoints selftests"

TEST_PROGS := breakpoint_test

endif



TEST_PROGS := breakpoint_test

all:



include ../lib.mk

tools/testing/selftests/lib.mk

+8 −5
Original line number Diff line number Diff line
@@ -12,11 +12,14 @@ run_tests: all 
	$(RUN_TESTS)



define INSTALL_RULE

	mkdir -p $(INSTALL_PATH)

	@for TEST_DIR in $(TEST_DIRS); do\

	@if [ "X$(TEST_PROGS)$(TEST_PROGS_EXTENDED)$(TEST_FILES)" != "X" ]; then			\

		mkdir -p $(INSTALL_PATH);								\

		for TEST_DIR in $(TEST_DIRS); do							\

			cp -r $$TEST_DIR $(INSTALL_PATH);						\

	done;

	install -t $(INSTALL_PATH) $(TEST_PROGS) $(TEST_PROGS_EXTENDED) $(TEST_FILES)

		done;											\

		echo "install -t $(INSTALL_PATH) $(TEST_PROGS) $(TEST_PROGS_EXTENDED) $(TEST_FILES)";	\

		install -t $(INSTALL_PATH) $(TEST_PROGS) $(TEST_PROGS_EXTENDED) $(TEST_FILES);		\

	fi

endef



install: all

tools/testing/selftests/zram/Makefile

0 → 100644
+9 −0
Original line number Diff line number Diff line 
all:



TEST_PROGS := zram.sh

TEST_FILES := zram01.sh zram02.sh zram_lib.sh



include ../lib.mk



clean:

	$(RM) err.log

tools/testing/selftests/zram/README

0 → 100644
+40 −0
Original line number Diff line number Diff line 
zram: Compressed RAM based block devices

----------------------------------------

* Introduction



The zram module creates RAM based block devices named /dev/zram<id>

(<id> = 0, 1, ...). Pages written to these disks are compressed and stored

in memory itself. These disks allow very fast I/O and compression provides

good amounts of memory savings. Some of the usecases include /tmp storage,

use as swap disks, various caches under /var and maybe many more :)



Statistics for individual zram devices are exported through sysfs nodes at

/sys/block/zram<id>/



Kconfig required:

CONFIG_ZRAM=y

CONFIG_ZRAM_LZ4_COMPRESS=y

CONFIG_ZPOOL=y

CONFIG_ZSMALLOC=y



ZRAM Testcases

--------------

zram_lib.sh: create library with initialization/cleanup functions

zram.sh: For sanity check of CONFIG_ZRAM and to run zram01 and zram02



Two functional tests: zram01 and zram02:

zram01.sh: creates general purpose ram disks with ext4 filesystems

zram02.sh: creates block device for swap



Commands required for testing:

 - bc

 - dd

 - free

 - awk

 - mkswap

 - swapon

 - swapoff

 - mkfs/ mkfs.ext4



For more information please refer:

kernel-source-tree/Documentation/blockdev/zram.txt