[PATCH 1/3] free enough memory before suspend/resume
DORMANTno replies
From: Li Shaohua <hidden>
Date: 2005-01-21 07:49:03
Free enough memory before suspend. SIgned-off-by: Li Shaohua<redacted> --- 2.5-root/kernel/power/main.c | 13 +++++++++++++ 1 files changed, 13 insertions(+) diff -puN kernel/power/main.c~free_memory_before_suspend kernel/power/main.c
--- 2.5/kernel/power/main.c~free_memory_before_suspend 2005-01-20 13:07:49.007943712 +0800
+++ 2.5-root/kernel/power/main.c 2005-01-20 13:09:58.067323704 +0800@@ -19,6 +19,8 @@ #include "power.h" +#define FREE_PAGE_NUMBER (100) + DECLARE_MUTEX(pm_sem); struct pm_ops * pm_ops = NULL;
@@ -49,6 +51,7 @@ 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 +63,16 @@ static int suspend_prepare(suspend_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;
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