Re: [RFC] userland swsusp

From: Pavel Machek
Date: Thu Nov 17 2005 - 05:02:07 EST


> > No. Writing to file would trash the filesystem. But you can bmap the file,
> > then write to the block device.
> And for reading, I could used a device mapper enforced read only mount or
> filesystem code from grub.

Or use a filesystem that honours read-only option, like ext2...

> Hmm, how about a possibility to ask the kernel for a list of free pages on a
> swap device? This way, userspace could write the image to swap as the kernel
> currently does, avoiding possible trouble with filesystems.

Yes, that is the plan.

> > Better avoid memory allocation.
> And all memory allocated and mapped in advance would be part of the image. But
> this is totally acceptable for a "suspend helper".

Thanks, Sharp!
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