From: Pavel Machek <pavel@ucw.cz>
To: Stefan Rompf <stefan@loplof.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [RFC] userland swsusp
Date: Thu, 17 Nov 2005 11:01:26 +0100 [thread overview]
Message-ID: <20051117100126.GA15341@elf.ucw.cz> (raw)
In-Reply-To: <200511170819.17046.stefan@loplof.de>
Hi!
> > 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".
Yes.
Pavel
--
Thanks, Sharp!
next prev parent reply other threads:[~2005-11-17 10:02 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-16 16:00 [RFC] userland swsusp Stefan Rompf
2005-11-16 19:07 ` Pavel Machek
2005-11-17 7:19 ` Stefan Rompf
2005-11-17 10:01 ` Pavel Machek [this message]
2005-11-21 6:23 ` Rob Landley
2005-11-21 14:14 ` Pavel Machek
-- strict thread matches above, loose matches on Subject: below --
2005-11-15 21:29 Pavel Machek
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