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unfs3: fixed the issue that unfsd consumes 100% CPU

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The 'accept' function on the socket of unfsd daemon
is always in below error state:
accept(4, 0x7ffd5e6dddc0, [128]) = -1 EINVAL (Invalid argument)
accept(6, 0x7ffd5e6dddc0, [128]) = -1 EINVAL (Invalid argument)

And 'strace -c -p <the pid of unfsd>' shows:
% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ----------------
 70.87    0.005392           0    513886    513886 accept
 29.13    0.002216           0    256943           poll

This error state is in the 'for' loop of the daemon, so it consumes 100%
CPU. The reason is that 'listen' is not called for the TCP socket before
'accept'. Actually the called 'svc_tli_create' from libtirpc will not call
'listen' on a bound socket.

(From OE-Core rev: 1f6784d2e839f81749d21ad1b615a9f7bb0e64d6)

Signed-off-by: Haiqing Bai <Haiqing.Bai@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Haiqing Bai
2019-10-24 10:33:04 +08:00
committed by Richard Purdie
parent 85903df1c1
commit 6d77529d62
2 changed files with 55 additions and 0 deletions
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meta/recipes-devtools/unfs3/unfs3_git.bb
+1
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@@ -23,6 +23,7 @@ SRC_URI = "git://github.com/unfs3/unfs3.git;protocol=https \
file://tcp_no_delay.patch \
file://0001-daemon.c-Libtirpc-porting-fixes.patch \
file://0001-attr-fix-utime-for-symlink.patch \
file://0001-Add-listen-action-for-a-tcp-socket.patch \
"
SRCREV = "c12a5c69a8d59be6916cbd0e0f41c159f1962425"
UPSTREAM_CHECK_GITTAGREGEX = "unfs3\-(?P<pver>.+)"