2 dnl # Enabled by default it provides a minimal level of memory tracking.
3 dnl # A total count of bytes allocated is kept for each alloc and free.
4 dnl # Then at module unload time a report to the console will be printed
5 dnl # if memory was leaked.
7 AC_DEFUN([SPL_AC_DEBUG_KMEM], [
8 AC_ARG_ENABLE([debug-kmem],
9 [AS_HELP_STRING([--enable-debug-kmem],
10 [Enable basic kmem accounting @<:@default=no@:>@])],
12 [enable_debug_kmem=no])
14 AS_IF([test "x$enable_debug_kmem" = xyes],
16 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM"
17 DEBUG_KMEM="_with_debug_kmem"
18 AC_DEFINE([DEBUG_KMEM], [1],
19 [Define to 1 to enable basic kmem accounting])
21 DEBUG_KMEM="_without_debug_kmem"
25 AC_MSG_CHECKING([whether basic kmem accounting is enabled])
26 AC_MSG_RESULT([$enable_debug_kmem])
30 dnl # Disabled by default it provides detailed memory tracking. This
31 dnl # feature also requires --enable-debug-kmem to be set. When enabled
32 dnl # not only will total bytes be tracked but also the location of every
33 dnl # alloc and free. When the SPL module is unloaded a list of all leaked
34 dnl # addresses and where they were allocated will be dumped to the console.
35 dnl # Enabling this feature has a significant impact on performance but it
36 dnl # makes finding memory leaks pretty straight forward.
38 AC_DEFUN([SPL_AC_DEBUG_KMEM_TRACKING], [
39 AC_ARG_ENABLE([debug-kmem-tracking],
40 [AS_HELP_STRING([--enable-debug-kmem-tracking],
41 [Enable detailed kmem tracking @<:@default=no@:>@])],
43 [enable_debug_kmem_tracking=no])
45 AS_IF([test "x$enable_debug_kmem_tracking" = xyes],
47 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM_TRACKING"
48 DEBUG_KMEM_TRACKING="_with_debug_kmem_tracking"
49 AC_DEFINE([DEBUG_KMEM_TRACKING], [1],
50 [Define to 1 to enable detailed kmem tracking])
52 DEBUG_KMEM_TRACKING="_without_debug_kmem_tracking"
55 AC_SUBST(DEBUG_KMEM_TRACKING)
56 AC_MSG_CHECKING([whether detailed kmem tracking is enabled])
57 AC_MSG_RESULT([$enable_debug_kmem_tracking])
62 dnl # __vmalloc PAGE_KERNEL removal
64 AC_DEFUN([ZFS_AC_KERNEL_SRC_VMALLOC_PAGE_KERNEL], [
65 ZFS_LINUX_TEST_SRC([__vmalloc], [
67 #include <linux/vmalloc.h>
69 void *p __attribute__ ((unused));
71 p = __vmalloc(0, GFP_KERNEL, PAGE_KERNEL);
75 AC_DEFUN([ZFS_AC_KERNEL_VMALLOC_PAGE_KERNEL], [
76 AC_MSG_CHECKING([whether __vmalloc(ptr, flags, pageflags) is available])
77 ZFS_LINUX_TEST_RESULT([__vmalloc], [
79 AC_DEFINE(HAVE_VMALLOC_PAGE_KERNEL, 1, [__vmalloc page flags exists])