As of the following commit merged at v5.1, zram uses lzo-rle by
default:
ce82f19fd5809f0cf87ea9f753c5cc65ca0673d6
zram: default to lzo-rle instead of lzo
The problem fixed by this commit is that the current implementation
wrongly recognizes lzo-rle as lzo because it pays attention to the
first 3 bytes of the name only.
Note that lzo-rle is implemented by kernel and not supported by
user-land library, say lzo-devel. To support lzo-rle, it's necessary
to import tthe kernel's lzo library into crash utility.
---
diskdump.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/diskdump.c b/diskdump.c
index 88d0dee..40d3eb7 100644
--- a/diskdump.c
+++ b/diskdump.c
@@ -2738,7 +2738,7 @@ try_zram_decompress(ulonglong pte_val, unsigned char *buf, ulong len, ulonglong
readmem(zram + OFFSET(zram_compressor), KVADDR, name,
sizeof(name), "zram compressor", FAULT_ON_ERROR);
- if (!strncmp(name, "lzo", strlen("lzo"))) {
+ if (STREQ(name, "lzo")) {
if (!(dd->flags & LZO_SUPPORTED)) {
if (lzo_init() == LZO_E_OK)
dd->flags |= LZO_SUPPORTED;
--
1.8.3.1
--
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