STABLE12-linux-pagelaunder-avoid-deadlock-20041012

FIXES 15239

mmap'd files can deadlock on linux; fix by not letting kernel free pages out of
our space predictively

(cherry picked from commit 33809f6c7382ab07d018809922a2a2b06e798b63)

diff --git a/src/afs/LINUX/osi_vnodeops.c b/src/afs/LINUX/osi_vnodeops.c
index 2f2f0cfd060e403e889144878efb009c2170b7d8..18e58505a48aeafb99d1fe601f9ee0eab18033be 100644 (file)
--- a/src/afs/LINUX/osi_vnodeops.c
+++ b/src/afs/LINUX/osi_vnodeops.c
@@ -1332,6 +1332,12 @@ int afs_linux_writepage(struct page *pp)
     unsigned offset = PAGE_CACHE_SIZE;
     long status;
  
+#ifdef PageLaunder
+    if (PageLaunder(pp)) {
+        return(fail_writepage(pp));
+    }
+#endif
+
     inode = (struct inode *) mapping->host;
     end_index = inode->i_size >> PAGE_CACHE_SHIFT;