PM / Hibernate: Improve performance of LZO/plain hibernation, checksum image
Use threads for LZO compression/decompression on hibernate/thaw.
Improve buffering on hibernate/thaw.
Calculate/verify CRC32 of the image pages on hibernate/thaw.
In my testing, this improved write/read speed by a factor of about two.
Signed-off-by: Bojan Smojver <bojan@rexursive.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index ea12c8f..1c53f7f 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -657,6 +657,9 @@
flags |= SF_PLATFORM_MODE;
if (nocompress)
flags |= SF_NOCOMPRESS_MODE;
+ else
+ flags |= SF_CRC32_MODE;
+
pr_debug("PM: writing image.\n");
error = swsusp_write(flags);
swsusp_free();