* Re: swsusp vs. modular IDE (or wherever your swap is)
2006-01-05 19:50 ` Pavel Machek
@ 2006-01-29 19:27 ` Andrey Borzenkov
0 siblings, 0 replies; 3+ messages in thread
From: Andrey Borzenkov @ 2006-01-29 19:27 UTC (permalink / raw)
To: Pavel Machek; +Cc: linux-kernel
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On Thursday 05 January 2006 22:50, Pavel Machek wrote:
> On Fri 06-01-06 17:16:30, Andrey Borzenkov wrote:
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> > Do I understand correctly that swsusp requires drivers for primary swap
> > to be compiled in kernel? It appears that initrd-based implementation is
> > possible (load drivers for resume partition and then attempt to do manual
> > resume via "echo x:y > /sys/power/resume") - are there any issues
> > associated with it?
>
> Except that it eats any mounted filesystems? No. Do mounts after
> echo and you should be fine.
well, this did not work at least naively. It correctly sets resume device and
I can suspend. But on resume I see "Stopping tasks: ====" after this booting
continues. I enabled debug but do not see anything at this moment.
Contents of linuxrc up to resume point:
{pts/0}% sudo cat /tmp/rc/linuxrc
#!/bin/nash
echo "Loading ide-core.ko module"
insmod /lib/ide-core.ko
echo "Loading alim15x3.ko module"
insmod /lib/alim15x3.ko
echo "Loading ide-disk.ko module"
insmod /lib/ide-disk.ko
echo "Loading reiserfs.ko module"
insmod /lib/reiserfs.ko
echo Mounting /proc filesystem
mount -t proc /proc /proc
echo Mounting sysfs
mount -t sysfs none /sys
echo Creating device files
mountdev size=32M,mode=0755
echo -n /sbin/hotplug > /proc/sys/kernel/hotplug
mkdir /dev/.udevdb
mkdevices /dev
echo Attempting resume
resume
resume is builtin (on top of RH/Mandriva nash):
int resumeCommand(char * cmd, char * end) {
char buf[20];
struct stat statbuf;
int fd;
int size;
char *resume, *rend;
resume = getKernelArg("resume=");
if (resume == NULL)
return 0;
rend = resume;
while (*rend && !isspace(*rend)) rend++;
*rend = '\0';
if ((stat(resume, &statbuf) == 0)) {
fd = open("/sys/power/resume", O_RDWR, 0);
if (fd < 0)
return 1;
size = snprintf(buf, sizeof(buf), "%u:%u",
major(statbuf.st_rdev), minor(statbuf.st_rdev));
if (size <= sizeof(buf))
write(fd, buf, size);
/* SHOULD NOT REACH HERE */
}
close(fd);
return 1;
}
and I boot with resume=/dev/hda1
Unfortunately, serial console is near to impossible (it is notebook without
COM port :(
- -andrey
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