diff options
| author | Lidong Chen <jemmy858585@gmail.com> | 2018-08-06 21:29:32 +0800 |
|---|---|---|
| committer | Juan Quintela <quintela@redhat.com> | 2018-08-22 12:13:59 +0200 |
| commit | 5d5f4d84366d61cf37c5009a669945f52ed9bdf9 (patch) | |
| tree | 310986845d3453966344933312999cb87a2415e3 | |
| parent | 4d9f675bcb031737cdab44930cab83a4491aa8ff (diff) | |
migration: invoke qio_channel_yield only when qemu_in_coroutine()
when qio_channel_read return QIO_CHANNEL_ERR_BLOCK, the source qemu crash.
The backtrace is:
(gdb) bt
#0 0x00007fb20aba91d7 in raise () from /lib64/libc.so.6
#1 0x00007fb20abaa8c8 in abort () from /lib64/libc.so.6
#2 0x00007fb20aba2146 in __assert_fail_base () from /lib64/libc.so.6
#3 0x00007fb20aba21f2 in __assert_fail () from /lib64/libc.so.6
#4 0x00000000008dba2d in qio_channel_yield (ioc=0x22f9e20, condition=G_IO_IN) at io/channel.c:460
#5 0x00000000007a870b in channel_get_buffer (opaque=0x22f9e20, buf=0x3d54038 "", pos=0, size=32768)
at migration/qemu-file-channel.c:83
#6 0x00000000007a70f6 in qemu_fill_buffer (f=0x3d54000) at migration/qemu-file.c:299
#7 0x00000000007a79d0 in qemu_peek_byte (f=0x3d54000, offset=0) at migration/qemu-file.c:562
#8 0x00000000007a7a22 in qemu_get_byte (f=0x3d54000) at migration/qemu-file.c:575
#9 0x00000000007a7c46 in qemu_get_be16 (f=0x3d54000) at migration/qemu-file.c:647
#10 0x0000000000796db7 in source_return_path_thread (opaque=0x2242280) at migration/migration.c:1794
#11 0x00000000009428fa in qemu_thread_start (args=0x3e58420) at util/qemu-thread-posix.c:504
#12 0x00007fb20af3ddc5 in start_thread () from /lib64/libpthread.so.0
#13 0x00007fb20ac6b74d in clone () from /lib64/libc.so.6
This patch fixed by invoke qio_channel_yield only when qemu_in_coroutine().
Signed-off-by: Lidong Chen <lidongchen@tencent.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
| -rw-r--r-- | migration/qemu-file-channel.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/migration/qemu-file-channel.c b/migration/qemu-file-channel.c index e202d73834..8e639eb496 100644 --- a/migration/qemu-file-channel.c +++ b/migration/qemu-file-channel.c @@ -49,7 +49,11 @@ static ssize_t channel_writev_buffer(void *opaque, ssize_t len; len = qio_channel_writev(ioc, local_iov, nlocal_iov, NULL); if (len == QIO_CHANNEL_ERR_BLOCK) { - qio_channel_wait(ioc, G_IO_OUT); + if (qemu_in_coroutine()) { + qio_channel_yield(ioc, G_IO_OUT); + } else { + qio_channel_wait(ioc, G_IO_OUT); + } continue; } if (len < 0) { @@ -80,7 +84,11 @@ static ssize_t channel_get_buffer(void *opaque, ret = qio_channel_read(ioc, (char *)buf, size, NULL); if (ret < 0) { if (ret == QIO_CHANNEL_ERR_BLOCK) { - qio_channel_yield(ioc, G_IO_IN); + if (qemu_in_coroutine()) { + qio_channel_yield(ioc, G_IO_IN); + } else { + qio_channel_wait(ioc, G_IO_IN); + } } else { /* XXX handle Error * object */ return -EIO; |