Tear down and flush the mmap region

The inode eviction should unmap the pages associated with the inode.
These pages should also be flushed to disk to avoid the data loss.
Therefore, use truncate_setsize() in evict_inode() to release the
pagecache.

The API truncate_setsize() was added in 2.6.35 kernel. To ensure
compatibility with the old kernel, the patch defines its own
truncate_setsize function.

Signed-off-by: Prasad Joshi <pjoshi@stec-inc.com>
Closes #255

Makefile.in

@@ -79,6 +79,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

cmd/Makefile.in

@@ -64,6 +64,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

cmd/mount_zfs/Makefile.in

@@ -67,6 +67,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

cmd/sas_switch_id/Makefile.in

@@ -66,6 +66,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

cmd/zdb/Makefile.in

@@ -67,6 +67,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

cmd/zfs/Makefile.in

@@ -67,6 +67,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

cmd/zinject/Makefile.in

@@ -67,6 +67,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

cmd/zpios/Makefile.in

@@ -67,6 +67,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

cmd/zpool/Makefile.in

@@ -67,6 +67,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

cmd/zpool_id/Makefile.in

@@ -66,6 +66,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

cmd/zpool_layout/Makefile.in

@@ -66,6 +66,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

cmd/ztest/Makefile.in

@@ -67,6 +67,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

cmd/zvol_id/Makefile.in

@@ -67,6 +67,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

config/kernel-truncate-setsize.m4

@@ -0,0 +1,12 @@
+dnl #
+dnl # 2.6.35 API change
+dnl # Added truncate_setsize() helper function.
+dnl #
+AC_DEFUN([ZFS_AC_KERNEL_TRUNCATE_SETSIZE], [
+	ZFS_CHECK_SYMBOL_EXPORT(
+		[truncate_setsize],
+		[mm/truncate.c],
+		[AC_DEFINE(HAVE_TRUNCATE_SETSIZE, 1,
+		[truncate_setsize() is available])],
+		[])
+])

config/kernel.m4

@@ -37,6 +37,7 @@ AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
 	ZFS_AC_KERNEL_INSERT_INODE_LOCKED
 	ZFS_AC_KERNEL_D_OBTAIN_ALIAS
 	ZFS_AC_KERNEL_CHECK_DISK_SIZE_CHANGE
+	ZFS_AC_KERNEL_TRUNCATE_SETSIZE
 
 	if test "$LINUX_OBJ" != "$LINUX"; then
 		KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"

configure

@@ -14527,6 +14527,46 @@ _ACEOF
 
 
 
+	{ $as_echo "$as_me:$LINENO: checking whether symbol truncate_setsize is exported" >&5
+$as_echo_n "checking whether symbol truncate_setsize is exported... " >&6; }
+	grep -q -E '[[:space:]]truncate_setsize[[:space:]]' \
+		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
+	rc=$?
+	if test $rc -ne 0; then
+		export=0
+		for file in mm/truncate.c; do
+			grep -q -E "EXPORT_SYMBOL.*(truncate_setsize)" "$LINUX/$file" 2>/dev/null
+			rc=$?
+		        if test $rc -eq 0; then
+		                export=1
+		                break;
+		        fi
+		done
+		if test $export -eq 0; then
+			{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+		else
+			{ $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_TRUNCATE_SETSIZE 1
+_ACEOF
+
+		fi
+	else
+		{ $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_TRUNCATE_SETSIZE 1
+_ACEOF
+
+	fi
+
+
+
 	if test "$LINUX_OBJ" != "$LINUX"; then
 		KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
 	fi
@@ -18653,6 +18693,46 @@ _ACEOF
 
 
 
+	{ $as_echo "$as_me:$LINENO: checking whether symbol truncate_setsize is exported" >&5
+$as_echo_n "checking whether symbol truncate_setsize is exported... " >&6; }
+	grep -q -E '[[:space:]]truncate_setsize[[:space:]]' \
+		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
+	rc=$?
+	if test $rc -ne 0; then
+		export=0
+		for file in mm/truncate.c; do
+			grep -q -E "EXPORT_SYMBOL.*(truncate_setsize)" "$LINUX/$file" 2>/dev/null
+			rc=$?
+		        if test $rc -eq 0; then
+		                export=1
+		                break;
+		        fi
+		done
+		if test $export -eq 0; then
+			{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+		else
+			{ $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_TRUNCATE_SETSIZE 1
+_ACEOF
+
+		fi
+	else
+		{ $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_TRUNCATE_SETSIZE 1
+_ACEOF
+
+	fi
+
+
+
 	if test "$LINUX_OBJ" != "$LINUX"; then
 		KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
 	fi

dracut/90zfs/Makefile.in

@@ -66,6 +66,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

dracut/Makefile.in

@@ -64,6 +64,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

etc/Makefile.in

@@ -64,6 +64,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

etc/init.d/Makefile.in

@@ -64,6 +64,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

etc/udev/Makefile.in

@@ -64,6 +64,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

etc/udev/rules.d/Makefile.in

@@ -65,6 +65,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

etc/zfs/Makefile.in

@@ -65,6 +65,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

include/Makefile.in

@@ -66,6 +66,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

include/linux/Makefile.in

@@ -66,6 +66,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

include/linux/vfs_compat.h

@@ -41,4 +41,25 @@ insert_inode_locked(struct inode *ip)
 }
 #endif /* HAVE_INSERT_INODE_LOCKED */
 
+/*
+ * 2.6.35 API change,
+ * Add truncate_setsize() if it is not exported by the Linux kernel.
+ *
+ * Truncate the inode and pages associated with the inode. The pages are
+ * unmapped and removed from cache.
+ */
+#ifndef HAVE_TRUNCATE_SETSIZE
+static inline void
+truncate_setsize(struct inode *ip, loff_t new)
+{
+	struct address_space *mapping = ip->i_mapping;
+
+	i_size_write(ip, new);
+
+	unmap_mapping_range(mapping, new + PAGE_SIZE - 1, 0, 1);
+	truncate_inode_pages(mapping, new);
+	unmap_mapping_range(mapping, new + PAGE_SIZE - 1, 0, 1);
+}
+#endif /* HAVE_TRUNCATE_SETSIZE */
+
 #endif /* _ZFS_VFS_H */

include/sys/Makefile.in

@@ -66,6 +66,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

include/sys/fm/Makefile.in

@@ -66,6 +66,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

include/sys/fm/fs/Makefile.in

@@ -66,6 +66,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

include/sys/fs/Makefile.in

@@ -66,6 +66,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

lib/Makefile.in

@@ -64,6 +64,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

lib/libavl/Makefile.in

@@ -66,6 +66,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

lib/libefi/Makefile.in

@@ -66,6 +66,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

lib/libnvpair/Makefile.in

@@ -66,6 +66,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

lib/libspl/Makefile.in

@@ -66,6 +66,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

lib/libspl/asm-generic/Makefile.in

@@ -65,6 +65,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

lib/libspl/asm-i386/Makefile.in

@@ -66,6 +66,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

lib/libspl/asm-x86_64/Makefile.in

@@ -66,6 +66,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

lib/libspl/include/Makefile.in

@@ -66,6 +66,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

lib/libspl/include/ia32/Makefile.in

@@ -64,6 +64,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

lib/libspl/include/ia32/sys/Makefile.in

@@ -66,6 +66,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

lib/libspl/include/rpc/Makefile.in

@@ -66,6 +66,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

lib/libspl/include/sys/Makefile.in

@@ -66,6 +66,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

lib/libspl/include/sys/dktp/Makefile.in

@@ -66,6 +66,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

lib/libspl/include/sys/sysevent/Makefile.in

@@ -66,6 +66,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

lib/libspl/include/util/Makefile.in

@@ -66,6 +66,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

lib/libunicode/Makefile.in

@@ -66,6 +66,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

lib/libuutil/Makefile.in

@@ -66,6 +66,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

lib/libzfs/Makefile.in

@@ -66,6 +66,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

lib/libzpool/Makefile.in

@@ -66,6 +66,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

man/Makefile.in

@@ -64,6 +64,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

man/man8/Makefile.in

@@ -64,6 +64,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

module/zfs/zpl_super.c

@@ -73,7 +73,7 @@ zpl_inode_destroy(struct inode *ip)
 static void
 zpl_evict_inode(struct inode *ip)
 {
-	truncate_inode_pages(&ip->i_data, 0);
+	truncate_setsize(ip, 0);
 	end_writeback(ip);
 	zfs_inactive(ip);
 }
@@ -89,7 +89,7 @@ zpl_clear_inode(struct inode *ip)
 static void
 zpl_inode_delete(struct inode *ip)
 {
-	truncate_inode_pages(&ip->i_data, 0);
+	truncate_setsize(ip, 0);
 	clear_inode(ip);
 }
 

scripts/Makefile.in

@@ -65,6 +65,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

scripts/zpios-profile/Makefile.in

@@ -65,6 +65,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

scripts/zpios-test/Makefile.in

@@ -65,6 +65,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

scripts/zpool-config/Makefile.in

@@ -65,6 +65,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

scripts/zpool-layout/Makefile.in

@@ -65,6 +65,7 @@ am__aclocal_m4_deps =  \
 	$(top_srcdir)/config/kernel-open-bdev-exclusive.m4 \
 	$(top_srcdir)/config/kernel-rq-for-each_segment.m4 \
 	$(top_srcdir)/config/kernel-rq-is_sync.m4 \
+	$(top_srcdir)/config/kernel-truncate-setsize.m4 \
 	$(top_srcdir)/config/kernel-xattr-handler.m4 \
 	$(top_srcdir)/config/kernel.m4 \
 	$(top_srcdir)/config/user-arch.m4 \

zfs_config.h.in

@@ -153,6 +153,9 @@
 /* Define to 1 if you have the <sys/types.h> header file. */
 #undef HAVE_SYS_TYPES_H
 
+/* truncate_setsize() is available */
+#undef HAVE_TRUNCATE_SETSIZE
+
 /* Define to 1 if you have the <unistd.h> header file. */
 #undef HAVE_UNISTD_H