Here is what strace shows:
recv(8, 0xbfced218, 8, MSG_DONTWAIT) = -1 EAGAIN (Resource temporarily
unavailable)
sendmsg(5, {msg_name(12)={sa_family=AF_NETLINK, pid=-4298, groups=00000000},
msg_iov(2)=[{"libudev\0\376\355\312\376(\0\0\0(\0\0\0\322\0\0\0\360\3\35\267{\313\305\356"...,
40}, {"UDEV_LOG=3\0ACTION=change\0DEVPATH"..., 210}], msg_controllen=0,
msg_flags=0}, 0) = 250
poll([{fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=6, events=POLLIN},
{fd=7, events=POLLIN}, {fd=8, events=POLLIN}], 5, -1) = 1 ([{fd=8,
revents=POLLIN}])
recv(8, "\341\17\0\0\0\0\0\0", 8, MSG_DONTWAIT) = 8
_llseek(3, 0, [11513544], SEEK_CUR) = 0
write(3, "\351\260\0\0\0\0\0\0\0\0", 10) = 10
recv(8, 0xbfced218, 8, MSG_DONTWAIT) = -1 EAGAIN (Resource temporarily
unavailable)
sendmsg(5, {msg_name(12)={sa_family=AF_NETLINK, pid=-4298, groups=00000000},
msg_iov(2)=[{"libudev\0\376\355\312\376(\0\0\0(\0\0\0\322\0\0\0\360\3\35\267{\313\305\356"...,
40}, {"UDEV_LOG=3\0ACTION=change\0DEVPATH"..., 210}], msg_controllen=0,
msg_flags=0}, 0) = 250
poll([{fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=6, events=POLLIN},
{fd=7, events=POLLIN}, {fd=8, events=POLLIN}], 5, -1) = 1 ([{fd=8,
revents=POLLIN}])
recv(8, "\341\17\0\0\0\0\0\0", 8, MSG_DONTWAIT) = 8
_llseek(3, 0, [11513554], SEEK_CUR) = 0
write(3, "\352\260\0\0\0\0\0\0\0\0", 10) = 10
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https://bugs.launchpad.net/bugs/780266
Title:
udevd takes 100% of cpu
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