diff options
| -rw-r--r-- | ufs/pokeloc.c | 63 |
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); +} + |