On Dec 19, 2007 8:31 PM, Rafael J. Wysocki <[email protected]> wrote:
>
> On Thursday, 20 of December 2007, Miles Lane wrote:
> > On Dec 19, 2007 7:09 PM, Rafael J. Wysocki <[email protected]> wrote:
> >
> > > On Thursday, 20 of December 2007, Christoph Lameter wrote:
> > > > On Thu, 20 Dec 2007, Rafael J. Wysocki wrote:
> > > >
> > > > > > We could reexport drain_local_pages() again but then I do not
> > > understand
> > > > > > why we would only drain the pages of this processor and not of all
> > > other
> > > > > > processors as well. It seems that software suspend intend was to
> > > flush
> > > > > > them all right?
> > > > >
> > > > > Well, not exactly. We are on one CPU at this point, the others have
> > > been
> > > > > disabled.
> > > >
> > > > Ok so the others are flush. Here is a patch to re-export
> > > > drain_local_pages() again and use it for software suspend:
> > > >
> > > > Signed-off-by: Christoph Lameter <[email protected]>
> > > >
> > > > ---
> > > > include/linux/gfp.h | 1 +
> > > > kernel/power/snapshot.c | 2 +-
> > > > mm/page_alloc.c | 2 +-
> > > > 3 files changed, 3 insertions(+), 2 deletions(-)
> > > >
> > > > Index: linux-2.6.24-rc5-mm1/kernel/power/snapshot.c
> > > > ===================================================================
> > > > --- linux-2.6.24-rc5-mm1.orig/kernel/power/snapshot.c 2007-12-19 11:59:
> > > 25.233961700 -0800
> > > > +++ linux-2.6.24-rc5-mm1/kernel/power/snapshot.c 2007-12-19 15:16:
> > > 34.179661929 -0800
> > > > @@ -1203,7 +1203,7 @@ asmlinkage int swsusp_save(void)
> > > >
> > > > printk(KERN_INFO "PM: Creating hibernation image: \n");
> > > >
> > > > - drain_all_pages();
> > > > + drain_local_pages(NULL);
> > > > nr_pages = count_data_pages();
> > > > nr_highmem = count_highmem_pages();
> > > > printk(KERN_INFO "PM: Need to copy %u pages\n", nr_pages +
> > > nr_highmem);
> > >
> > > You've omitted the second instance, right before the copy_data_pages()
> > > call.
> > >
> >
> > I guess I will wait for a revised patch.
>
> There's an Andrew's fix on top of this one in -mm:
> http://marc.info/?l=linux-mm-commits&m=119810866812965&w=2
>
>
>
> > > > Index: linux-2.6.24-rc5-mm1/mm/page_alloc.c
> > > > ===================================================================
> > > > --- linux-2.6.24-rc5-mm1.orig/mm/page_alloc.c 2007-12-19 12:01:
> > > 00.630421258 -0800
> > > > +++ linux-2.6.24-rc5-mm1/mm/page_alloc.c 2007-12-19 15:12:
> > > 19.850545818 -0800
> > > > @@ -930,7 +930,7 @@ static void drain_pages(unsigned int cpu
> > > > /*
> > > > * Spill all of this CPU's per-cpu pages back into the buddy allocator.
> > > > */
> > > > -static void drain_local_pages(void *arg)
> > > > +void drain_local_pages(void *arg)
> > > > {
> > > > drain_pages(smp_processor_id());
> > > > }
> > > > Index: linux-2.6.24-rc5-mm1/include/linux/gfp.h
> > > > ===================================================================
> > > > --- linux-2.6.24-rc5-mm1.orig/include/linux/gfp.h 2007-12-19 15:13:
> > > 51.926950065 -0800
> > > > +++ linux-2.6.24-rc5-mm1/include/linux/gfp.h 2007-12-19 15:16:
> > > 11.951564369 -0800
> > > > @@ -229,5 +229,6 @@ extern void FASTCALL(free_cold_page(stru
> > > > void page_alloc_init(void);
> > > > void drain_zone_pages(struct zone *zone, struct per_cpu_pages *pcp);
> > > > void drain_all_pages(void);
> > > > +void drain_local_pages(void *dummy);
> > > >
> > > > #endif /* __LINUX_GFP_H */
> > >
>
I applied Christoph and Andrew's patches and recompiled. I suspended
to disk and to ram several times and all looks good.
Miles
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
