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Tear down and flush the mmap region

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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
This commit is contained in:
Prasad Joshi
2011-06-25 13:30:29 +01:00
committed by Brian Behlendorf
parent 560bcf9d14
commit b312979252
59 changed files with 172 additions and 2 deletions
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configure
Vendored
+80
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@@ -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