From: Barry Song Date: Mon, 9 Jan 2012 04:56:23 +0000 (+0800) Subject: PM / Hibernate: Drop the check of swap space size for compressed image X-Git-Tag: Ubuntu-5.2.0-15.16~18883^2 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=ee34a37049114303011e154478c63b977bcff24c;p=mirror_ubuntu-eoan-kernel.git PM / Hibernate: Drop the check of swap space size for compressed image For compressed image, the space required is not known until we finish compressing and writing all pages. This patch drops the check, and if swap space is not enough finally, system can still restore to normal after writing swap fails for compressed images. Signed-off-by: Barry Song Acked-by: Pavel Machek Signed-off-by: Rafael J. Wysocki --- diff --git a/kernel/power/swap.c b/kernel/power/swap.c index 3739ecced085..8742fd013a94 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);