changeset b69cc0fd934d in /z/repo/m5
details: http://repo.m5sim.org/m5?cmd=changeset;node=b69cc0fd934d
description:
util/m5/m5.c: ensure readfile() buffer pages are in page table
(and marked dirty, in case that matters) by touching them beforehand
diffstat:
util/m5/m5.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diffs (15 lines):
diff -r cfbbc9178e7a -r b69cc0fd934d util/m5/m5.c
--- a/util/m5/m5.c Thu Aug 12 17:16:02 2010 -0700
+++ b/util/m5/m5.c Thu Aug 12 17:16:04 2010 -0700
@@ -65,6 +65,11 @@
int offset = 0;
int len;
+ // Touch all buffer pages to ensure they are mapped in the
+ // page table. This is required in the case of X86_FS, where
+ // Linux does demand paging.
+ memset(buf, 0, sizeof(buf));
+
while ((len = m5_readfile(buf, sizeof(buf), offset)) > 0) {
write(dest_fid, buf, len);
offset += len;
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