Hibernation fails when the kernel cannot allocate enough memory to copy all pages in use. This patch ensures that the failure reason is clearly logged. Signed-off-by: Luigi Semenzato <semenzato@xxxxxxxxxx> --- kernel/power/snapshot.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c index 26b9168321e7..df498717a97e 100644 --- a/kernel/power/snapshot.c +++ b/kernel/power/snapshot.c @@ -1705,16 +1705,20 @@ int hibernate_preallocate_memory(void) ktime_t start, stop; int error; - pr_info("Preallocating image memory... "); + pr_info("Preallocating hibernation image memory\n"); start = ktime_get(); error = memory_bm_create(&orig_bm, GFP_IMAGE, PG_ANY); - if (error) + if (error) { + pr_err("Cannot allocate original bitmap\n"); goto err_out; + } error = memory_bm_create(©_bm, GFP_IMAGE, PG_ANY); - if (error) + if (error) { + pr_err("Cannot allocate copy bitmap\n"); goto err_out; + } alloc_normal = 0; alloc_highmem = 0; @@ -1804,8 +1808,11 @@ int hibernate_preallocate_memory(void) alloc -= pages; pages += pages_highmem; pages_highmem = preallocate_image_highmem(alloc); - if (pages_highmem < alloc) + if (pages_highmem < alloc) { + pr_err("Image allocation is %lu pages short\n", + alloc - pages_highmem); goto err_out; + } pages += pages_highmem; /* * size is the desired number of saveable pages to leave in @@ -1836,13 +1843,12 @@ int hibernate_preallocate_memory(void) out: stop = ktime_get(); - pr_cont("done (allocated %lu pages)\n", pages); + pr_info("Allocated %lu pages for hibernation shapshot\n", pages); swsusp_show_speed(start, stop, pages, "Allocated"); return 0; err_out: - pr_cont("\n"); swsusp_free(); return -ENOMEM; } -- 2.24.1.735.g03f4e72817-goog