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| author | Bojan Smojver <bojan@rexursive.com> | 2011-10-13 23:58:07 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2011-10-16 23:30:38 +0200 |
| commit | 081a9d043c983f161b78fdc4671324d1342b86bc (patch) | |
| tree | 4382d88e5705b18a95471af2a71319401c47744f /kernel/power/hibernate.c | |
| parent | d231ff1af70a2df43d809173cf8c94e9c3beb853 (diff) | |
| download | lwn-081a9d043c983f161b78fdc4671324d1342b86bc.tar.gz lwn-081a9d043c983f161b78fdc4671324d1342b86bc.zip | |
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>
Diffstat (limited to 'kernel/power/hibernate.c')
| -rw-r--r-- | kernel/power/hibernate.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c index ea12c8f1bdfd..1c53f7fad5f7 100644 --- a/kernel/power/hibernate.c +++ b/kernel/power/hibernate.c @@ -657,6 +657,9 @@ int hibernate(void) 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(); |