On Sun, May 03, 2009 at 02:24:20AM +0200, Rafael J. Wysocki wrote: > From: Rafael J. Wysocki <rjw@xxxxxxx> > > Modify the hibernation memory shrinking code so that it will make > memory allocations to free memory instead of using an artificial > memory shrinking mechanism for that. Remove the shrinking of > memory from the suspend-to-RAM code, where it is not really > necessary. Finally, remove the no longer used memory shrinking > functions from mm/vmscan.c . > > [rev. 2: Use the existing memory bitmaps for marking preallocated > image pages and use swsusp_free() from releasing them, introduce > GFP_IMAGE, add comments describing the memory shrinking strategy.] > > Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx> > --- > kernel/power/main.c | 20 ------ > kernel/power/snapshot.c | 132 +++++++++++++++++++++++++++++++++----------- > mm/vmscan.c | 142 ------------------------------------------------ > 3 files changed, 101 insertions(+), 193 deletions(-) > > Index: linux-2.6/kernel/power/snapshot.c > =================================================================== > --- linux-2.6.orig/kernel/power/snapshot.c > +++ linux-2.6/kernel/power/snapshot.c > @@ -1066,41 +1066,97 @@ void swsusp_free(void) > buffer = NULL; > } > > +/* Helper functions used for the shrinking of memory. */ > + > +#ifdef CONFIG_HIGHMEM > +#define GFP_IMAGE (GFP_KERNEL | __GFP_HIGHMEM | __GFP_NO_OOM_KILL) > +#else > +#define GFP_IMAGE (GFP_KERNEL | __GFP_NO_OOM_KILL) > +#endif The CONFIG_HIGHMEM test is not necessary: __GFP_HIGHMEM is always defined. > +#define SHRINK_BITE 10000 This is ~40MB. A full scan of (for example) 8G pages will be time consuming, not to mention we have to do it 2*(8G-500M)/40M = 384 times! Can we make it a LONG_MAX? Thanks, Fengguang _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
