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authorMichael I. Bushnell <mib@gnu.org>1994-10-03 19:03:08 +0000
committerMichael I. Bushnell <mib@gnu.org>1994-10-03 19:03:08 +0000
commit588abe541e6e06d9a9605bfa62212d4beed476d4 (patch)
treec7c9b82f2def1916d5a0474e447959bcd572815c
parent13de9fd35dd1e8c1cc031b63e92f11cdd40c4c4c (diff)
Initial revision
-rw-r--r--ufs/pokeloc.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/ufs/pokeloc.c b/ufs/pokeloc.c
new file mode 100644
index 00000000..bf3c9add
--- /dev/null
+++ b/ufs/pokeloc.c
@@ -0,0 +1,63 @@
+/* Remember where we've written the disk to speed up sync
+ Copyright (C) 1994 Free Software Foundation, Inc.
+ Written by Michael I. Bushnell.
+
+ This file is part of the GNU Hurd.
+
+ The GNU Hurd is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2, or (at
+ your option) any later version.
+
+ The GNU Hurd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ufs.h"
+
+struct pokeloc
+{
+ vm_offset_t offset;
+ vm_size_t length;
+ struct pokeloc *next;
+};
+
+struct pokeloc *pokelist;
+spin_lock_t pokelistlock = SPIN_LOCK_INITIAILIZER;
+
+/* Remember that data here on the disk has been modified. */
+void
+record_poke (vm_offset_t offset, vm_size_t length)
+{
+ struct pokeloc *pl = malloc (sizeof (struct pokeloc));
+ pl->offset = trunc_page (offset);
+ pl->length = round_page (offset + length) - pl->offset;
+
+ spin_lock (&pokelistlock);
+ pl->next = pokelist;
+ pokelist = pl;
+ spin_unlock (&pokelistlock);
+}
+
+/* Sync all the modified pieces of disk */
+void
+sync_disk (int wait)
+{
+ struct pokeloc *pl, *tmp;
+
+ spin_lock (&pokelistlock);
+ for (pl = pokelist; pl; pl = tmp)
+ {
+ pager_sync_some (diskpager->p, pl->offset, pl->length, wait);
+ tmp = pl->next;
+ free (pl);
+ }
+ pokelist = 0;
+ spin_unlock (&pokelistlock);
+}
+