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charset="utf-8" And take the param->mutex lock for the whole section to ensure thread-safety. Now, it is explicitly clear if there is no queued data to send. Before, this was handled by param->file stream being empty and thus qemu_put_qemu_file() not sending anything. This will be used in the next commits to move save_page_header() out of compress code. Signed-off-by: Lukas Straub Reviewed-by: Juan Quintela --- migration/ram.c | 32 ++++++++++++++++++++++---------- 1 file changed, 22 insertions(+), 10 deletions(-) diff --git a/migration/ram.c b/migration/ram.c index 820b4ebaeb..5ca0f115cf 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -1519,6 +1519,13 @@ update_compress_thread_counts(const CompressParam *p= aram, int bytes_xmit) static bool save_page_use_compression(RAMState *rs); +static inline void compress_reset_result(CompressParam *param) +{ + param->result =3D RES_NONE; + param->block =3D NULL; + param->offset =3D 0; +} + static void flush_compressed_data(RAMState *rs) { MigrationState *ms =3D migrate_get_current(); @@ -1540,13 +1547,16 @@ static void flush_compressed_data(RAMState *rs) for (idx =3D 0; idx < thread_count; idx++) { qemu_mutex_lock(&comp_param[idx].mutex); if (!comp_param[idx].quit) { - len =3D qemu_put_qemu_file(ms->to_dst_file, comp_param[idx].fi= le); + CompressParam *param =3D &comp_param[idx]; + len =3D qemu_put_qemu_file(ms->to_dst_file, param->file); + compress_reset_result(param); + /* * it's safe to fetch zero_page without holding comp_done_lock * as there is no further request submitted to the thread, * i.e, the thread should be waiting for a request at this poi= nt. */ - update_compress_thread_counts(&comp_param[idx], len); + update_compress_thread_counts(param, len); } qemu_mutex_unlock(&comp_param[idx].mutex); } @@ -1571,15 +1581,17 @@ static int compress_page_with_multi_thread(RAMBlock= *block, ram_addr_t offset) retry: for (idx =3D 0; idx < thread_count; idx++) { if (comp_param[idx].done) { - comp_param[idx].done =3D false; - bytes_xmit =3D qemu_put_qemu_file(ms->to_dst_file, - comp_param[idx].file); - qemu_mutex_lock(&comp_param[idx].mutex); - set_compress_params(&comp_param[idx], block, offset); - qemu_cond_signal(&comp_param[idx].cond); - qemu_mutex_unlock(&comp_param[idx].mutex); + CompressParam *param =3D &comp_param[idx]; + qemu_mutex_lock(¶m->mutex); + param->done =3D false; + bytes_xmit =3D qemu_put_qemu_file(ms->to_dst_file, param->file= ); + compress_reset_result(param); + set_compress_params(param, block, offset); + + update_compress_thread_counts(param, bytes_xmit); + qemu_cond_signal(¶m->cond); + qemu_mutex_unlock(¶m->mutex); pages =3D 1; - update_compress_thread_counts(&comp_param[idx], bytes_xmit); break; } } -- 2.40.0 --Sig_/kyBS=5mWfb_ii4L98I+T7_/ Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEg/qxWKDZuPtyYo+kNasLKJxdslgFAmRBClMACgkQNasLKJxd slgBpA/+OgeaPmPVXas+NfbEXADUppcJHhp6vTW2Y72prv6MNTCOwAWCqfRfi/rQ 2Sh3unQI4Agi9/XSyWg7oD2RNsSYlGJB7N5dVh4B2BUVyrFoZGe2JcATv6xe79Ew jqu3KG0a1LzLlOWWITchgILmcBp5QxOUo+3HecZ2lhIo1yCdeajoZBW/fHq9P+p7 SM4QmdKMJBEPL/5QdzG/QOhOeUNgEsKHCxLgsVjErwDAN8aytCsBI2qa6TiaC4Qb toWssViDt7knujnx5ZF6F8NwBEl8EFzOxhnS6su98REeaQ/0ibIkBCMwceQ3NSRL h4S7FSP1tr8YWq9pDutH9sPXYfUC9Lk9C9Jr7iEqFQewXtRmSB0T0fnedgGn6lm/ gqIX6RcfFJQ1ye+CL2MMWw/akpH6OiU2MTXysBKEllWpY1qYsnP3z6Nt4CD8hqjQ JMthSscKrNthZabiUwT1nz7jD0OzQuuL/BhNApYPNiamvtbv7rb8Vbq7sPPuyA9+ Es1vIHDnTxR/6+GM2mtPjnH3dwm66noOiYgcs3DXCTp4iEEsP+n435nPNVv1Ggp7 uh5GVMx8DKTeKQcsNPFCV6ps1/PCD5NH9NUCb1kUkgJ0Vm3Z+5z5nuPlkca/sX2J IqlH5VMEt+UhXNLuSg3OAfyJhHuxzmZ0WBuGPO/oDHfO4eJIQu8= =2UQN -----END PGP SIGNATURE----- --Sig_/kyBS=5mWfb_ii4L98I+T7_/--