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[Qemu-devel] [PATCH 6/7] dump: hoist lzo_init() from get_len_buf_out() t
From: |
Laszlo Ersek |
Subject: |
[Qemu-devel] [PATCH 6/7] dump: hoist lzo_init() from get_len_buf_out() to dump_init() |
Date: |
Tue, 20 May 2014 13:42:22 +0200 |
qmp_dump_guest_memory()
dump_init()
lzo_init() <---------+
create_kdump_vmcore() |
write_dump_pages() |
get_len_buf_out() |
lzo_init() ------+
This patch doesn't change the fact that lzo_init() is called for every
LZO-compressed dump, but it makes get_len_buf_out() more focused (single
responsibility).
Suggested-by: Paolo Bonzini <address@hidden>
Signed-off-by: Laszlo Ersek <address@hidden>
---
dump.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)
diff --git a/dump.c b/dump.c
index 7e0982b..b87045e 100644
--- a/dump.c
+++ b/dump.c
@@ -1229,17 +1229,10 @@ static size_t get_len_buf_out(size_t page_size,
uint32_t flag_compress)
/* buf size for zlib */
len_buf_out_zlib = compressBound(page_size);
/* buf size for lzo */
#ifdef CONFIG_LZO
- if (flag_compress & DUMP_DH_COMPRESSED_LZO) {
- if (lzo_init() != LZO_E_OK) {
- /* return 0 to indicate lzo is unavailable */
- return 0;
- }
- }
-
/*
* LZO will expand incompressible data by a little amount. please check the
* following URL to see the expansion calculation:
* http://www.oberhumer.com/opensource/lzo/lzofaq.php
*/
@@ -1623,10 +1616,16 @@ static int dump_init(DumpState *s, int fd, bool
has_format,
case DUMP_GUEST_MEMORY_FORMAT_KDUMP_ZLIB:
s->flag_compress = DUMP_DH_COMPRESSED_ZLIB;
break;
case DUMP_GUEST_MEMORY_FORMAT_KDUMP_LZO:
+#ifdef CONFIG_LZO
+ if (lzo_init() != LZO_E_OK) {
+ error_setg(errp, "failed to initialize the LZO library");
+ goto cleanup;
+ }
+#endif
s->flag_compress = DUMP_DH_COMPRESSED_LZO;
break;
case DUMP_GUEST_MEMORY_FORMAT_KDUMP_SNAPPY:
s->flag_compress = DUMP_DH_COMPRESSED_SNAPPY;
--
1.8.3.1
- [Qemu-devel] [PATCH 0/7] cleanups for compressed dumps (kdumps), Laszlo Ersek, 2014/05/20
- [Qemu-devel] [PATCH 3/7] dump: eliminate DumpState.page_shift ("guest's page shift"), Laszlo Ersek, 2014/05/20
- [Qemu-devel] [PATCH 6/7] dump: hoist lzo_init() from get_len_buf_out() to dump_init(),
Laszlo Ersek <=
- [Qemu-devel] [PATCH 7/7] dump: simplify get_len_buf_out(), Laszlo Ersek, 2014/05/20
- [Qemu-devel] [PATCH 5/7] dump: select header bitness based on ELF class, not ELF architecture, Laszlo Ersek, 2014/05/20
- [Qemu-devel] [PATCH 4/7] dump: eliminate DumpState.page_size ("guest's page size"), Laszlo Ersek, 2014/05/20
- Re: [Qemu-devel] [PATCH 0/7] cleanups for compressed dumps (kdumps), Paolo Bonzini, 2014/05/20
- Re: [Qemu-devel] [PATCH 0/7] cleanups for compressed dumps (kdumps), Luiz Capitulino, 2014/05/28