Re: [RFC] userland swsusp

From: Stefan Rompf
Date: Thu Nov 17 2005 - 02:18:36 EST

Am Mittwoch 16 November 2005 20:07 schrieb Pavel Machek:

> 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.

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.

> 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".

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at