在 2025/3/14 20:22, Herbert Xu 写道:
Replace the legacy crypto compression interface with the new acomp
interface.
Remove the compression mutexes and the overallocation for memory
(the offender LZO has been fixed).
Hi, Herbert. Can you show me which patch fixed the problem in LZO?
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
---
fs/ubifs/compress.c | 116 ++++++++++++++++++++++++++++----------------
fs/ubifs/journal.c | 2 +-
fs/ubifs/ubifs.h | 15 +-----
3 files changed, 77 insertions(+), 56 deletions(-)
[...]
diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h
index 3375bbe0508c..7d0aaf5d2e23 100644
--- a/fs/ubifs/ubifs.h
+++ b/fs/ubifs/ubifs.h
@@ -124,13 +124,6 @@
#define OLD_ZNODE_AGE 20
#define YOUNG_ZNODE_AGE 5
-/*
- * Some compressors, like LZO, may end up with more data then the input buffer.
- * So UBIFS always allocates larger output buffer, to be sure the compressor
- * will not corrupt memory in case of worst case compression.
- */
-#define WORST_COMPR_FACTOR 2
Does LZO guarantee the output data length smaller than input buffer
length? Which commit fixed the issue?
-
#ifdef CONFIG_FS_ENCRYPTION
#define UBIFS_CIPHER_BLOCK_SIZE FSCRYPT_CONTENTS_ALIGNMENT
#else
