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| author | Dr. David Alan Gilbert <dgilbert@redhat.com> | 2018-03-12 17:21:17 +0000 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2018-03-20 16:40:37 +0200 |
| commit | dedfb4b21af6c5deb71c3c08b663dafec98e9f31 (patch) | |
| tree | a0297bbe4762b89a2be19adc7bcfe4b684b86600 /migration | |
| parent | c07e36158fe342e3da8d10c34ba4fc82f28a5d1b (diff) | |
| download | qemu-dedfb4b21af6c5deb71c3c08b663dafec98e9f31.zip qemu-dedfb4b21af6c5deb71c3c08b663dafec98e9f31.tar.gz qemu-dedfb4b21af6c5deb71c3c08b663dafec98e9f31.tar.bz2 | |
vhost+postcopy: Call wakeups
Cause the vhost-user client to be woken up whenever:
a) We place a page in postcopy mode
b) We get a fault and the page has already been received
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'migration')
| -rw-r--r-- | migration/postcopy-ram.c | 14 | ||||
| -rw-r--r-- | migration/trace-events | 1 |
2 files changed, 11 insertions, 4 deletions
diff --git a/migration/postcopy-ram.c b/migration/postcopy-ram.c index 83c36d7..6894399 100644 --- a/migration/postcopy-ram.c +++ b/migration/postcopy-ram.c @@ -558,7 +558,11 @@ int postcopy_request_shared_page(struct PostCopyFD *pcfd, RAMBlock *rb, trace_postcopy_request_shared_page(pcfd->idstr, qemu_ram_get_idstr(rb), rb_offset); - /* TODO: Check bitmap to see if we already have the page */ + if (ramblock_recv_bitmap_test_byte_offset(rb, aligned_rbo)) { + trace_postcopy_request_shared_page_present(pcfd->idstr, + qemu_ram_get_idstr(rb), rb_offset); + return postcopy_wake_shared(pcfd, client_addr, rb); + } if (rb != mis->last_rb) { mis->last_rb = rb; migrate_send_rp_req_pages(mis, qemu_ram_get_idstr(rb), @@ -866,7 +870,8 @@ int postcopy_place_page(MigrationIncomingState *mis, void *host, void *from, } trace_postcopy_place_page(host); - return 0; + return postcopy_notify_shared_wake(rb, + qemu_ram_block_host_offset(rb, host)); } /* @@ -890,6 +895,9 @@ int postcopy_place_page_zero(MigrationIncomingState *mis, void *host, return -e; } + return postcopy_notify_shared_wake(rb, + qemu_ram_block_host_offset(rb, + host)); } else { /* The kernel can't use UFFDIO_ZEROPAGE for hugepages */ if (!mis->postcopy_tmp_zero_page) { @@ -909,8 +917,6 @@ int postcopy_place_page_zero(MigrationIncomingState *mis, void *host, return postcopy_place_page(mis, host, mis->postcopy_tmp_zero_page, rb); } - - return 0; } /* diff --git a/migration/trace-events b/migration/trace-events index b0acaaa..1e353a3 100644 --- a/migration/trace-events +++ b/migration/trace-events @@ -199,6 +199,7 @@ postcopy_ram_incoming_cleanup_entry(void) "" postcopy_ram_incoming_cleanup_exit(void) "" postcopy_ram_incoming_cleanup_join(void) "" postcopy_request_shared_page(const char *sharer, const char *rb, uint64_t rb_offset) "for %s in %s offset 0x%"PRIx64 +postcopy_request_shared_page_present(const char *sharer, const char *rb, uint64_t rb_offset) "%s already %s offset 0x%"PRIx64 postcopy_wake_shared(uint64_t client_addr, const char *rb) "at 0x%"PRIx64" in %s" save_xbzrle_page_skipping(void) "" |