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migration/multifd: put IOV initialization into compression method

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Different compression methods may require different numbers of IOVs.
Based on streaming compression of zlib and zstd, all pages will be
compressed to a data block, so two IOVs are needed for packet header
and compressed data block.

Signed-off-by: Yuan Liu <yuan1.liu@intel.com>
Reviewed-by: Nanhai Zou <nanhai.zou@intel.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
This commit is contained in:
Yuan Liu
2024-06-10 18:21:05 +08:00
committed by Fabiano Rosas
parent 0d40b3d76c
commit d9d3e4f243
3 changed files with 26 additions and 11 deletions
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migration/multifd-zstd.c
+7 -1
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@@ -52,7 +52,6 @@ static int zstd_send_setup(MultiFDSendParams *p, Error **errp)
struct zstd_data *z = g_new0(struct zstd_data, 1);
int res;
p->compress_data = z;
z->zcs = ZSTD_createCStream();
if (!z->zcs) {
g_free(z);
@@ -77,6 +76,10 @@ static int zstd_send_setup(MultiFDSendParams *p, Error **errp)
error_setg(errp, "multifd %u: out of memory for zbuff", p->id);
return -1;
}
p->compress_data = z;
/* Needs 2 IOVs, one for packet header and one for compressed data */
p->iov = g_new0(struct iovec, 2);
return 0;
}
@@ -98,6 +101,9 @@ static void zstd_send_cleanup(MultiFDSendParams *p, Error **errp)
z->zbuff = NULL;
g_free(p->compress_data);
p->compress_data = NULL;
g_free(p->iov);
p->iov = NULL;
}
/**