Messages in this thread | | | Date | Tue, 1 Nov 2011 03:55:50 +0800 | Subject | Re: [RFC][PATCH 0/2] PM / Sleep: Extended control of suspend/hibernate interfaces | From | Ming Lei <> |
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Hi,
On Fri, Oct 14, 2011 at 3:45 AM, Rafael J. Wysocki <rjw@sisk.pl> wrote:
> Second, to address the backup problem, we need to allow user space > processes other than the suspend/hibernate process itself to prevent the > system from being put into sleep states. A mechanism for that is introduced > by the second patch in the form of the /dev/sleepctl special device working > kind of like user space wakelocks on Android (although in a simplified > fashion).
I also have another similar example: write(fd, buffer, 100*4096).
Suppose only 80*4096 are copied into pages of the file, then someone run ' echo mem > /sys/power/state ' to trigger system sleep, so only partial writing is completed before system sleep and data inconsistence may be caused for the file on filesystem.
But I am not sure if it is possible to happen in reality.
thank, -- Ming Lei -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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