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migration/next for 20151125

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Merge remote-tracking branch 'remotes/juanquintela/tags/migration/20151125' into staging

migration/next for 20151125

# gpg: Signature made Wed 25 Nov 2015 14:28:47 GMT using RSA key ID 5872D723
# gpg: Good signature from "Juan Quintela <quintela@redhat.com>"
# gpg:                 aka "Juan Quintela <quintela@trasno.org>"

* remotes/juanquintela/tags/migration/20151125:
  block-migration: limit the memory usage
  Assume madvise for (no)hugepage works

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2015-11-25 16:20:58 +00:00
commit c7933a80bc
2 changed files with 8 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
migration/block.c
View File

@ -36,6 +36,8 @@
#define MAX_IS_ALLOCATED_SEARCH 65536
#define MAX_INFLIGHT_IO 512
//#define DEBUG_BLK_MIGRATION
#ifdef DEBUG_BLK_MIGRATION
@ -665,7 +667,10 @@ static int block_save_iterate(QEMUFile *f, void *opaque)
blk_mig_lock();
while ((block_mig_state.submitted +
block_mig_state.read_done) * BLOCK_SIZE <
qemu_file_get_rate_limit(f)) {
qemu_file_get_rate_limit(f) &&
(block_mig_state.submitted +
block_mig_state.read_done) <
MAX_INFLIGHT_IO) {
blk_mig_unlock();
if (block_mig_state.bulk_completed == 0) {
/* first finish the bulk phase */

10
migration/postcopy-ram.c
View File

@ -241,10 +241,7 @@ static int cleanup_range(const char *block_name, void *host_addr,
* We turned off hugepage for the precopy stage with postcopy enabled
* we can turn it back on now.
*/
if (qemu_madvise(host_addr, length, QEMU_MADV_HUGEPAGE)) {
error_report("%s HUGEPAGE: %s", __func__, strerror(errno));
return -1;
}
qemu_madvise(host_addr, length, QEMU_MADV_HUGEPAGE);
/*
* We can also turn off userfault now since we should have all the
@ -345,10 +342,7 @@ static int nhp_range(const char *block_name, void *host_addr,
* do delete areas of the page, even if THP thinks a hugepage would
* be a good idea, so force hugepages off.
*/
if (qemu_madvise(host_addr, length, QEMU_MADV_NOHUGEPAGE)) {
error_report("%s: NOHUGEPAGE: %s", __func__, strerror(errno));
return -1;
}
qemu_madvise(host_addr, length, QEMU_MADV_NOHUGEPAGE);
return 0;
}