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| author | Alan Stern <stern@rowland.harvard.edu> | 2007-05-04 11:52:20 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-07-12 16:29:47 -0700 |
| commit | 0458d5b4c9cc4ca0f62625d0144ddc4b4bc97a3c (patch) | |
| tree | 8b1fcb4f063ef4aa6f2e3cd41a60d986a1e432d4 /Documentation/power | |
| parent | ce7cd137fced114d49178b73d468b82096a107fb (diff) | |
| download | lwn-0458d5b4c9cc4ca0f62625d0144ddc4b4bc97a3c.tar.gz lwn-0458d5b4c9cc4ca0f62625d0144ddc4b4bc97a3c.zip | |
USB: add USB-Persist facility
This patch (as886) adds the controversial USB-persist facility,
allowing USB devices to persist across a power loss during system
suspend.
The facility is controlled by a new Kconfig option (with appropriate
warnings about the potential dangers); when the option is off the
behavior will remain the same as it is now. But when the option is
on, people will be able to use suspend-to-disk and keep their USB
filesystems intact -- something particularly valuable for small
machines where the root filesystem is on a USB device!
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'Documentation/power')
| -rw-r--r-- | Documentation/power/swsusp.txt | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/power/swsusp.txt b/Documentation/power/swsusp.txt index 5b8d6953f05e..152b510d1bbb 100644 --- a/Documentation/power/swsusp.txt +++ b/Documentation/power/swsusp.txt @@ -393,6 +393,9 @@ safest thing is to unmount all filesystems on removable media (such USB, Firewire, CompactFlash, MMC, external SATA, or even IDE hotplug bays) before suspending; then remount them after resuming. +There is a work-around for this problem. For more information, see +Documentation/usb/persist.txt. + Q: I upgraded the kernel from 2.6.15 to 2.6.16. Both kernels were compiled with the similar configuration files. Anyway I found that suspend to disk (and resume) is much slower on 2.6.16 compared to |