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multifd: Use proper maximum compression values

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It happens that there are functions to calculate the worst possible
compression size for a packet.  Use them.

Suggested-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Juan Quintela 2021-11-26 10:30:32 +01:00
parent 47fe16ff66
commit fc6705229c
2 changed files with 4 additions and 4 deletions
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4
migration/multifd-zlib.c
View file

@ -54,8 +54,8 @@ static int zlib_send_setup(MultiFDSendParams *p, Error **errp)
error_setg(errp, "multifd %u: deflate init failed", p->id); error_setg(errp, "multifd %u: deflate init failed", p->id);
return -1; return -1;
} }
/* To be safe, we reserve twice the size of the packet */ /* This is the maxium size of the compressed buffer */
z->zbuff_len = MULTIFD_PACKET_SIZE * 2; z->zbuff_len = compressBound(MULTIFD_PACKET_SIZE);
z->zbuff = g_try_malloc(z->zbuff_len); z->zbuff = g_try_malloc(z->zbuff_len);
if (!z->zbuff) { if (!z->zbuff) {
deflateEnd(&z->zs); deflateEnd(&z->zs);

4
migration/multifd-zstd.c
View file

@ -67,8 +67,8 @@ static int zstd_send_setup(MultiFDSendParams *p, Error **errp)
p->id, ZSTD_getErrorName(res)); p->id, ZSTD_getErrorName(res));
return -1; return -1;
} }
/* To be safe, we reserve twice the size of the packet */ /* This is the maxium size of the compressed buffer */
z->zbuff_len = MULTIFD_PACKET_SIZE * 2; z->zbuff_len = ZSTD_compressBound(MULTIFD_PACKET_SIZE);
z->zbuff = g_try_malloc(z->zbuff_len); z->zbuff = g_try_malloc(z->zbuff_len);
if (!z->zbuff) { if (!z->zbuff) {
ZSTD_freeCStream(z->zcs); ZSTD_freeCStream(z->zcs);