diff options
Diffstat (limited to 'kernel/power')
| -rw-r--r-- | kernel/power/process.c | 19 | ||||
| -rw-r--r-- | kernel/power/snapshot.c | 9 | ||||
| -rw-r--r-- | kernel/power/swap.c | 13 | ||||
| -rw-r--r-- | kernel/power/user.c | 9 |
4 files changed, 43 insertions, 7 deletions
diff --git a/kernel/power/process.c b/kernel/power/process.c index 77274c9ba2f..eeca00311f3 100644 --- a/kernel/power/process.c +++ b/kernel/power/process.c @@ -188,3 +188,22 @@ void thaw_processes(void) printk("done.\n"); } +void thaw_kernel_threads(void) +{ + struct task_struct *g, *p; + + pm_nosig_freezing = false; + printk("Restarting kernel threads ... "); + + thaw_workqueues(); + + read_lock(&tasklist_lock); + do_each_thread(g, p) { + if (p->flags & (PF_KTHREAD | PF_WQ_WORKER)) + __thaw_task(p); + } while_each_thread(g, p); + read_unlock(&tasklist_lock); + + schedule(); + printk("done.\n"); +} diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c index cbe2c144139..6a768e53700 100644 --- a/kernel/power/snapshot.c +++ b/kernel/power/snapshot.c @@ -812,7 +812,8 @@ unsigned int snapshot_additional_pages(struct zone *zone) unsigned int res; res = DIV_ROUND_UP(zone->spanned_pages, BM_BITS_PER_BLOCK); - res += DIV_ROUND_UP(res * sizeof(struct bm_block), PAGE_SIZE); + res += DIV_ROUND_UP(res * sizeof(struct bm_block), + LINKED_PAGE_DATA_SIZE); return 2 * res; } @@ -858,6 +859,9 @@ static struct page *saveable_highmem_page(struct zone *zone, unsigned long pfn) PageReserved(page)) return NULL; + if (page_is_guard(page)) + return NULL; + return page; } @@ -920,6 +924,9 @@ static struct page *saveable_page(struct zone *zone, unsigned long pfn) && (!kernel_page_present(page) || pfn_is_nosave(pfn))) return NULL; + if (page_is_guard(page)) + return NULL; + return page; } diff --git a/kernel/power/swap.c b/kernel/power/swap.c index 3739ecced08..8742fd013a9 100644 --- a/kernel/power/swap.c +++ b/kernel/power/swap.c @@ -773,8 +773,7 @@ static int enough_swap(unsigned int nr_pages, unsigned int flags) pr_debug("PM: Free swap pages: %u\n", free_swap); - required = PAGES_FOR_IO + ((flags & SF_NOCOMPRESS_MODE) ? - nr_pages : (nr_pages * LZO_CMP_PAGES) / LZO_UNC_PAGES + 1); + required = PAGES_FOR_IO + nr_pages; return free_swap > required; } @@ -802,10 +801,12 @@ int swsusp_write(unsigned int flags) printk(KERN_ERR "PM: Cannot get swap writer\n"); return error; } - if (!enough_swap(pages, flags)) { - printk(KERN_ERR "PM: Not enough free swap\n"); - error = -ENOSPC; - goto out_finish; + if (flags & SF_NOCOMPRESS_MODE) { + if (!enough_swap(pages, flags)) { + printk(KERN_ERR "PM: Not enough free swap\n"); + error = -ENOSPC; + goto out_finish; + } } memset(&snapshot, 0, sizeof(struct snapshot_handle)); error = snapshot_read_next(&snapshot); diff --git a/kernel/power/user.c b/kernel/power/user.c index 6b1ab7a8852..e5a21a85730 100644 --- a/kernel/power/user.c +++ b/kernel/power/user.c @@ -274,6 +274,15 @@ static long snapshot_ioctl(struct file *filp, unsigned int cmd, swsusp_free(); memset(&data->handle, 0, sizeof(struct snapshot_handle)); data->ready = 0; + /* + * It is necessary to thaw kernel threads here, because + * SNAPSHOT_CREATE_IMAGE may be invoked directly after + * SNAPSHOT_FREE. In that case, if kernel threads were not + * thawed, the preallocation of memory carried out by + * hibernation_snapshot() might run into problems (i.e. it + * might fail or even deadlock). + */ + thaw_kernel_threads(); break; case SNAPSHOT_PREF_IMAGE_SIZE: |