On Monday 14 August 2006 00:04, Andrew Morton wrote:
> On Thu, 10 Aug 2006 15:23:41 +0200
> "Rafael J. Wysocki" <[email protected]> wrote:
>
> > Make swsusp use memory bitmaps to store its internal information during the
> > resume phase of the suspend-resume cycle.
>
> This patch makes the resume-time disk IO go all slow again.
>
> Time to read 80k pages:
>
> 2.6.18-rc4: 24 seconds
> 2.6.18-rc4+akpm-speedups: 10 seconds
> 2.6.18-rc4+akpm-speedups+this-patch: 24 seconds
Well, I removed one line too many, sorry.
kernel/power/snapshot.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletion(-)
Index: linux-2.6.18-rc4-mm1/kernel/power/snapshot.c
===================================================================
--- linux-2.6.18-rc4-mm1.orig/kernel/power/snapshot.c
+++ linux-2.6.18-rc4-mm1/kernel/power/snapshot.c
@@ -1278,13 +1278,14 @@ int snapshot_write_next(struct snapshot_
chain_init(&ca, GFP_ATOMIC, PG_SAFE);
memory_bm_position_reset(&orig_bm);
restore_pblist = NULL;
- handle->sync_read = 0;
handle->buffer = get_buffer(&orig_bm, &ca);
+ handle->sync_read = 0;
if (!handle->buffer)
return -ENOMEM;
}
} else {
handle->buffer = get_buffer(&orig_bm, &ca);
+ handle->sync_read = 0;
}
handle->prev = handle->cur;
}
-
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