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vm_node_stat must be used instead of vm_zone_stat. Unfortunately the old code still compiles potentially leading to silent failure of arc_evictable_memory() AKAMAI: CR 3816601: Regression in zfs dropcache test Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Chunwei Chen <tuxoko@gmail.com> Signed-off-by: Debabrata Banerjee <dbanerje@akamai.com> Closes #6528
23 lines
565 B
Plaintext
23 lines
565 B
Plaintext
dnl #
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dnl # 4.8 API change
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dnl # kernel vm counters change
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_VM_NODE_STAT], [
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AC_MSG_CHECKING([whether to use vm_node_stat based fn's])
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/mm.h>
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#include <linux/vmstat.h>
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],[
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int a __attribute__ ((unused)) = NR_VM_NODE_STAT_ITEMS;
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long x __attribute__ ((unused)) =
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atomic_long_read(&vm_node_stat[0]);
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(void) global_node_page_state(0);
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(ZFS_GLOBAL_NODE_PAGE_STATE, 1,
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[using global_node_page_state()])
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],[
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AC_MSG_RESULT(no)
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])
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])
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