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ram.c: Dont change param->block in the compress thread 

Instead introduce a extra parameter to trigger the compress thread.
Now, when the compress thread is done, we know what RAMBlock and
offset it did compress.

This will be used in the next commits to move save_page_header()
out of compress code.

Signed-off-by: Lukas Straub <lukasstraub2@web.de>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Lukas Straub 2023-04-20 11:47:59 +02:00 committed by Juan Quintela
parent 97274a871f
commit 10c2f7b747
1 changed files with 4 additions and 2 deletions
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6
migration/ram.c
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@ -492,6 +492,7 @@ typedef enum CompressResult CompressResult;
struct CompressParam {
bool done;
bool quit;
bool trigger;
CompressResult result;
QEMUFile *file;
QemuMutex mutex;
@ -565,10 +566,10 @@ static void *do_data_compress(void *opaque)
qemu_mutex_lock(&param->mutex);
while (!param->quit) {
if (param->block) {
if (param->trigger) {
block = param->block;
offset = param->offset;
param->block = NULL;
param->trigger = false;
qemu_mutex_unlock(&param->mutex);
result = do_compress_ram_page(param->file, &param->stream,
@ -1545,6 +1546,7 @@ static inline void set_compress_params(CompressParam *param, RAMBlock *block,
{
param->block = block;
param->offset = offset;
param->trigger = true;
}
static int compress_page_with_multi_thread(RAMBlock *block, ram_addr_t offset)