https://bugzilla.samba.org/show_bug.cgi?id=11683
Bug ID: 11683
Summary: hang on select when send many files
Product: rsync
Version: 3.1.2
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P5
Component: core
Assignee: wayned at samba.org
Reporter: tom916 at qq.com
QA Contact: rsync-qa at samba.org
iobuf.msg.size default is 32k
so when send many files it may be hang on perform_io
and why iobuf.msg.len always increase to big and never reduce
.x86_64
(gdb) bt
#0 0x000000322bce1353 in __select_nocancel () from /lib64/libc.so.6
#1 0x0000000000429d7a in perform_io (needed=154, flags=4) at io.c:742
#2 0x000000000042b45a in send_msg (code=MSG_LOG,
buf=0x7fff8ed87400 "10.126.100.201 682364
tjtx-100-200_20160121_135901/aifang_dw/contract_snapshot_detail_20151103.MYD
682244 2015/12/05-18:53:33 recv 114409 fullbak\n",
len=147, convert=0) at io.c:958
#3 0x00000000004218a0 in rwrite (code=FLOG,
buf=0x7fff8ed87400 "10.126.100.201 682364
tjtx-100-200_20160121_135901/aifang_dw/contract_snapshot_detail_20151103.MYD
682244 2015/12/05-18:53:33 recv 114409 fullbak\n",
len=147, is_utf8=0) at log.c:277
#4 0x000000000042299c in log_formatted (code=FLOG, format=<value optimized
out>, op=0x45170a "recv", file=0x7f976a8cb360, fname=0x0, iflags=40960,
hlink=0x0) at log.c:769
#5 0x0000000000422eaa in log_item (code=FINFO, file=0x7f976a8cb360,
iflags=40960, hlink=0x0) at log.c:806
#6 0x0000000000413966 in recv_files (f_in=3, f_out=7, local_name=0x0) at
receiver.c:852
#7 0x000000000041d3dc in do_recv (f_in=3, f_out=7, local_name=0x0) at
main.c:901
#8 0x000000000041dbbd in do_server_recv (f_in=3, f_out=3, argc=<value
optimized out>, argv=<value optimized out>) at main.c:1070
#9 start_server (f_in=3, f_out=3, argc=<value optimized out>, argv=<value
optimized out>) at main.c:1104
#10 0x000000000043c5b8 in rsync_module (f_in=3, f_out=3, i=3, addr=<value
optimized out>, host=0x67d2a0 "tjtx-100-201.58os.org") at clientserver.c:1003
#11 0x000000000043d58d in start_daemon (f_in=3, f_out=3) at clientserver.c:1094
#12 0x0000000000433b20 in start_accept_loop (port=873, fn=0x43d3b0
<start_daemon>) at socket.c:618
#13 0x000000000043d77b in daemon_main () at clientserver.c:1196
#14 0x000000000041ee25 in main (argc=0, argv=0x0) at main.c:1621
(gdb)
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