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| author | David Shaohua Li <shaohua.li@intel.com> | 2005-03-18 16:27:13 -0500 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2005-07-11 23:21:54 -0400 |
| commit | 5ae947ecc9c1c23834201e5321684a5cb68bdd3f (patch) | |
| tree | 2d6b2df724d5973eb9baeae70cf3742639404021 | |
| parent | e2a5b420f716cd1a46674b1a90389612eced916f (diff) | |
| download | linux-5ae947ecc9c1c23834201e5321684a5cb68bdd3f.tar.gz linux-5ae947ecc9c1c23834201e5321684a5cb68bdd3f.tar.bz2 linux-5ae947ecc9c1c23834201e5321684a5cb68bdd3f.zip | |
[ACPI] Suspend to RAM fix
Free some RAM before entering S3 so that upon
resume we can be sure early allocations will succeed.
http://bugzilla.kernel.org/show_bug.cgi?id=3469
Signed-off-by: David Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
| -rw-r--r-- | kernel/power/main.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/kernel/power/main.c b/kernel/power/main.c index c7eb4a833db5..454434716f35 100644 --- a/kernel/power/main.c +++ b/kernel/power/main.c @@ -19,6 +19,9 @@ #include "power.h" +/*This is just an arbitrary number */ +#define FREE_PAGE_NUMBER (100) + DECLARE_MUTEX(pm_sem); struct pm_ops * pm_ops = NULL; @@ -49,6 +52,7 @@ void pm_set_ops(struct pm_ops * ops) static int suspend_prepare(suspend_state_t state) { int error = 0; + unsigned int free_pages; if (!pm_ops || !pm_ops->enter) return -EPERM; @@ -60,6 +64,16 @@ static int suspend_prepare(suspend_state_t state) goto Thaw; } + if ((free_pages = nr_free_pages()) < FREE_PAGE_NUMBER) { + pr_debug("PM: free some memory\n"); + shrink_all_memory(FREE_PAGE_NUMBER - free_pages); + if (nr_free_pages() < FREE_PAGE_NUMBER) { + error = -ENOMEM; + printk(KERN_ERR "PM: No enough memory\n"); + goto Thaw; + } + } + if (pm_ops->prepare) { if ((error = pm_ops->prepare(state))) goto Thaw; |