[Crash-utility] [PATCH v2 4/7] diskname, zram: Notify necessity of loading zram module
By the previous commit, trying to read swapped-out-into-zram-disk
pages results in inaccessible memory error that is apparently
irrelevant to zram and users cannot find it necessary to load zram
module. Thus, let's add a warning message to indicate that as follows:
crash> rd -u 0x7f520626e000
WARNING: Some pages are swapped out to zram. Please run mod -s zram.
rd: invalid user virtual address: 7f520626e000 type: "64-bit UVADDR"
Signed-off-by: HATAYAMA Daisuke <d.hatayama(a)fujitsu.com>
---
diskdump.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/diskdump.c b/diskdump.c
index 587b45c..143ac3c 100644
--- a/diskdump.c
+++ b/diskdump.c
@@ -2757,8 +2757,13 @@ try_zram_decompress(ulonglong pte_val, unsigned char *buf, ulong
len, ulonglong
if (INVALID_MEMBER(zram_compressor)) {
zram_init();
- if (INVALID_MEMBER(zram_compressor))
+ if (INVALID_MEMBER(zram_compressor)) {
+ error(WARNING,
+ "Some pages are swapped out to zram. "
+ "Please run mod -s zram.\n",
+ name);
return 0;
+ }
}
if (CRASHDEBUG(2))
--
1.8.3.1