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diskdump, zram: Notify necessity of loading zram module

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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@fujitsu.com>
This commit is contained in:
HATAYAMA Daisuke 2020-12-25 15:48:47 +09:00 committed by Kazuhito Hagio
parent c951b82bb3
commit 8a877e9146
1 changed files with 5 additions and 1 deletions
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6
diskdump.c
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@ -2755,8 +2755,12 @@ 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");
return 0;
}
}
if (CRASHDEBUG(2))