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[PATCH] swsusp: freeze user space processes first

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Allow swsusp to freeze processes successfully under heavy load by freezing
userspace processes before kernel threads.

[Thanks to Nigel Cunningham <nigel@suspend2.net> for suggesting the
way to go.]

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Rafael J. Wysocki
2006-03-23 03:00:04 -08:00
committed by Linus Torvalds
parent 6e1819d615
commit 02aaeb9b95
3 changed files with 47 additions and 18 deletions
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kernel/power/user.c
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@@ -138,7 +138,6 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp,
case SNAPSHOT_FREEZE:
if (data->frozen)
break;
sys_sync();
down(&pm_sem);
pm_prepare_console();
disable_nonboot_cpus();