152 lines
4.0 KiB
Plaintext
152 lines
4.0 KiB
Plaintext
dnl #
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dnl # 3.1 API change
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dnl # The super_block structure now stores a per-filesystem shrinker.
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dnl # This interface is preferable because it can be used to specifically
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dnl # target only the zfs filesystem for pruning.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_SUPER_BLOCK_S_SHRINK], [
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ZFS_LINUX_TEST_SRC([super_block_s_shrink], [
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#include <linux/fs.h>
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int shrink(struct shrinker *s, struct shrink_control *sc)
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{ return 0; }
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static const struct super_block
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sb __attribute__ ((unused)) = {
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.s_shrink.seeks = DEFAULT_SEEKS,
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.s_shrink.batch = 0,
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};
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],[])
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])
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AC_DEFUN([ZFS_AC_KERNEL_SUPER_BLOCK_S_SHRINK], [
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AC_MSG_CHECKING([whether super_block has s_shrink])
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ZFS_LINUX_TEST_RESULT([super_block_s_shrink], [
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AC_MSG_RESULT(yes)
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],[
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ZFS_LINUX_TEST_ERROR([sb->s_shrink()])
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])
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])
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dnl #
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dnl # 3.12 API change
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dnl # The nid member was added to struct shrink_control to support
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dnl # NUMA-aware shrinkers.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_SHRINK_CONTROL_HAS_NID], [
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ZFS_LINUX_TEST_SRC([shrink_control_nid], [
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#include <linux/fs.h>
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],[
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struct shrink_control sc __attribute__ ((unused));
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unsigned long scnidsize __attribute__ ((unused)) =
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sizeof(sc.nid);
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_SHRINK_CONTROL_HAS_NID], [
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AC_MSG_CHECKING([whether shrink_control has nid])
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ZFS_LINUX_TEST_RESULT([shrink_control_nid], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(SHRINK_CONTROL_HAS_NID, 1,
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[struct shrink_control has nid])
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],[
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AC_MSG_RESULT(no)
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_SRC_SHRINKER_CALLBACK], [
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ZFS_LINUX_TEST_SRC([shrinker_cb_shrink_control], [
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#include <linux/mm.h>
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int shrinker_cb(struct shrinker *shrink,
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struct shrink_control *sc) { return 0; }
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],[
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struct shrinker cache_shrinker = {
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.shrink = shrinker_cb,
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.seeks = DEFAULT_SEEKS,
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};
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register_shrinker(&cache_shrinker);
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])
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ZFS_LINUX_TEST_SRC([shrinker_cb_shrink_control_split], [
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#include <linux/mm.h>
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unsigned long shrinker_cb(struct shrinker *shrink,
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struct shrink_control *sc) { return 0; }
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],[
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struct shrinker cache_shrinker = {
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.count_objects = shrinker_cb,
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.scan_objects = shrinker_cb,
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.seeks = DEFAULT_SEEKS,
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};
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register_shrinker(&cache_shrinker);
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_SHRINKER_CALLBACK],[
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dnl #
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dnl # 3.0 - 3.11 API change
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dnl # ->shrink(struct shrinker *, struct shrink_control *sc)
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dnl #
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AC_MSG_CHECKING([whether new 2-argument shrinker exists])
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ZFS_LINUX_TEST_RESULT([shrinker_cb_shrink_control], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_SINGLE_SHRINKER_CALLBACK, 1,
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[new shrinker callback wants 2 args])
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],[
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AC_MSG_RESULT(no)
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dnl #
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dnl # 3.12 API change,
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dnl # ->shrink() is logically split in to
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dnl # ->count_objects() and ->scan_objects()
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dnl #
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AC_MSG_CHECKING([whether ->count_objects callback exists])
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ZFS_LINUX_TEST_RESULT([shrinker_cb_shrink_control_split], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_SPLIT_SHRINKER_CALLBACK, 1,
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[->count_objects exists])
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],[
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ZFS_LINUX_TEST_ERROR([shrinker])
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])
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])
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])
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dnl #
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dnl # 2.6.39 API change,
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dnl # Shrinker adjust to use common shrink_control structure.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_SHRINK_CONTROL_STRUCT], [
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ZFS_LINUX_TEST_SRC([shrink_control_struct], [
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#include <linux/mm.h>
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],[
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struct shrink_control sc __attribute__ ((unused));
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sc.nr_to_scan = 0;
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sc.gfp_mask = GFP_KERNEL;
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_SHRINK_CONTROL_STRUCT], [
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AC_MSG_CHECKING([whether struct shrink_control exists])
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ZFS_LINUX_TEST_RESULT([shrink_control_struct], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_SHRINK_CONTROL_STRUCT, 1,
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[struct shrink_control exists])
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],[
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ZFS_LINUX_TEST_ERROR([shrink_control])
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_SRC_SHRINKER], [
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ZFS_AC_KERNEL_SRC_SUPER_BLOCK_S_SHRINK
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ZFS_AC_KERNEL_SRC_SHRINK_CONTROL_HAS_NID
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ZFS_AC_KERNEL_SRC_SHRINKER_CALLBACK
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ZFS_AC_KERNEL_SRC_SHRINK_CONTROL_STRUCT
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])
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AC_DEFUN([ZFS_AC_KERNEL_SHRINKER], [
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ZFS_AC_KERNEL_SUPER_BLOCK_S_SHRINK
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ZFS_AC_KERNEL_SHRINK_CONTROL_HAS_NID
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ZFS_AC_KERNEL_SHRINKER_CALLBACK
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ZFS_AC_KERNEL_SHRINK_CONTROL_STRUCT
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])
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