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Remove shrink_{i,d}node_cache() wrappers

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This is optional functionality which may or may not be useful to
ZFS when using older kernels.  It is never a hard requirement.
Therefore this functionality is being removed from the SPL and
a simpler slimmed down version will be added to ZFS.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit is contained in:
Brian Behlendorf
2014-10-01 19:27:29 -04:00
parent 8bbbe46f86
commit 89a461e70c
7 changed files with 15 additions and 268 deletions
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config/spl-build.m4
-44
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@@ -46,8 +46,6 @@ AC_DEFUN([SPL_AC_CONFIG_KERNEL], [
SPL_AC_KVASPRINTF
SPL_AC_EXPORTED_RWSEM_IS_LOCKED
SPL_AC_KERNEL_FALLOCATE
SPL_AC_SHRINK_DCACHE_MEMORY
SPL_AC_SHRINK_ICACHE_MEMORY
SPL_AC_KERN_PATH
SPL_AC_CONFIG_KALLSYMS
SPL_AC_CONFIG_ZLIB_INFLATE
@@ -1465,48 +1463,6 @@ AC_DEFUN([SPL_AC_EXPORTED_RWSEM_IS_LOCKED],
])
])
dnl #
dnl # 2.6.xx API compat,
dnl # There currently exists no exposed API to partially shrink the dcache.
dnl # The expected mechanism to shrink the cache is a registered shrinker
dnl # which is called during memory pressure.
dnl #
AC_DEFUN([SPL_AC_SHRINK_DCACHE_MEMORY],
[AC_MSG_CHECKING([whether shrink_dcache_memory() is available])
SPL_LINUX_TRY_COMPILE_SYMBOL([
#include <linux/dcache.h>
], [
shrink_dcache_memory(0, 0);
], [shrink_dcache_memory], [fs/dcache.c], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_SHRINK_DCACHE_MEMORY, 1,
[shrink_dcache_memory() is available])
], [
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 2.6.xx API compat,
dnl # There currently exists no exposed API to partially shrink the icache.
dnl # The expected mechanism to shrink the cache is a registered shrinker
dnl # which is called during memory pressure.
dnl #
AC_DEFUN([SPL_AC_SHRINK_ICACHE_MEMORY],
[AC_MSG_CHECKING([whether shrink_icache_memory() is available])
SPL_LINUX_TRY_COMPILE_SYMBOL([
#include <linux/dcache.h>
], [
shrink_icache_memory(0, 0);
], [shrink_icache_memory], [fs/inode.c], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_SHRINK_ICACHE_MEMORY, 1,
[shrink_icache_memory() is available])
], [
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 2.6.28 API change
dnl # The kern_path() function has been introduced. We adopt it as the new way