* epoll broken [was: mmotm 2011-01-25-15-47 uploaded] [not found] <201101260021.p0Q0LxsS016458@imap1.linux-foundation.org> @ 2011-02-03 7:39 ` Jiri Slaby 2011-02-03 7:53 ` Eric Dumazet 0 siblings, 1 reply; 3+ messages in thread From: Jiri Slaby @ 2011-02-03 7:39 UTC (permalink / raw) To: linux-kernel; +Cc: akpm, mm-commits, ML netdev, davidel On 01/26/2011 12:48 AM, akpm@linux-foundation.org wrote: > The mm-of-the-moment snapshot 2011-01-25-15-47 has been uploaded to Hi, the network daemons are broken here. cupsd and httpd children segfault too often without servicing requests. It's a regression against mmotm 2011-01-06-15-41. It's epoll after it dies: 17836 epoll_create(8192) = 3 ... 17836 accept(7, {sa_family=AF_FILE, NULL}, [2]) = 11 17836 getsockname(11, {sa_family=AF_FILE, path="/var/run/cups/cups.sock"}, [26]) = 0 17836 setsockopt(11, SOL_TCP, TCP_NODELAY, [1], 4) = -1 EOPNOTSUPP (Operation not supported) 17836 fcntl(11, F_GETFD) = 0 17836 fcntl(11, F_SETFD, FD_CLOEXEC) = 0 17836 epoll_ctl(3, EPOLL_CTL_ADD, 11, {EPOLLIN, {u32=379708832, u64=140428630418848}}) = 0 17836 epoll_wait(3, {{EPOLLIN, {u32=379708832, u64=140428630418848}}}, 8192, 1000) = 1 17836 recvfrom(11, "P", 1, MSG_PEEK, NULL, NULL) = 1 17836 poll([{fd=11, events=POLLIN}], 1, 10000) = 1 ([{fd=11, revents=POLLIN}]) 17836 recvfrom(11, "POST / HTTP/1.1\r\nContent-Length:"..., 2048, 0, NULL, NULL) = 771 17836 sendto(11, "HTTP/1.1 100 Continue\r\n\r\n", 25, 0, NULL, 0) = 25 17836 epoll_wait(3, {{EPOLLIN, {u32=379708832, u64=140428630418848}}, {0, {u32=0, u64=0}} .............. {0, {u32=0, u64=0}}, ?} 0x7fb816996660, 8192, 0) = 379151968 17836 --- SIGSEGV (Segmentation fault) @ 0 (0) --- 17836 +++ killed by SIGSEGV +++ The parameter, the same as the retval, seems to be bogus. Is it known (fixed in newer kernels)? thanks, -- js ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: epoll broken [was: mmotm 2011-01-25-15-47 uploaded] 2011-02-03 7:39 ` epoll broken [was: mmotm 2011-01-25-15-47 uploaded] Jiri Slaby @ 2011-02-03 7:53 ` Eric Dumazet 2011-02-03 9:03 ` Jiri Slaby 0 siblings, 1 reply; 3+ messages in thread From: Eric Dumazet @ 2011-02-03 7:53 UTC (permalink / raw) To: Jiri Slaby; +Cc: linux-kernel, akpm, mm-commits, ML netdev, davidel Le jeudi 03 février 2011 à 08:39 +0100, Jiri Slaby a écrit : > On 01/26/2011 12:48 AM, akpm@linux-foundation.org wrote: > > The mm-of-the-moment snapshot 2011-01-25-15-47 has been uploaded to > > Hi, the network daemons are broken here. cupsd and httpd children > segfault too often without servicing requests. It's a regression against > mmotm 2011-01-06-15-41. > > It's epoll after it dies: > 17836 epoll_create(8192) = 3 > ... > 17836 accept(7, {sa_family=AF_FILE, NULL}, [2]) = 11 > 17836 getsockname(11, {sa_family=AF_FILE, > path="/var/run/cups/cups.sock"}, [26]) = 0 > 17836 setsockopt(11, SOL_TCP, TCP_NODELAY, [1], 4) = -1 EOPNOTSUPP > (Operation not supported) > 17836 fcntl(11, F_GETFD) = 0 > 17836 fcntl(11, F_SETFD, FD_CLOEXEC) = 0 > 17836 epoll_ctl(3, EPOLL_CTL_ADD, 11, {EPOLLIN, {u32=379708832, > u64=140428630418848}}) = 0 > 17836 epoll_wait(3, {{EPOLLIN, {u32=379708832, u64=140428630418848}}}, > 8192, 1000) = 1 > 17836 recvfrom(11, "P", 1, MSG_PEEK, NULL, NULL) = 1 > 17836 poll([{fd=11, events=POLLIN}], 1, 10000) = 1 ([{fd=11, > revents=POLLIN}]) > 17836 recvfrom(11, "POST / HTTP/1.1\r\nContent-Length:"..., 2048, 0, > NULL, NULL) = 771 > 17836 sendto(11, "HTTP/1.1 100 Continue\r\n\r\n", 25, 0, NULL, 0) = 25 > 17836 epoll_wait(3, {{EPOLLIN, {u32=379708832, u64=140428630418848}}, > {0, {u32=0, u64=0}} .............. {0, {u32=0, u64=0}}, ?} > 0x7fb816996660, 8192, 0) = 379151968 > 17836 --- SIGSEGV (Segmentation fault) @ 0 (0) --- > 17836 +++ killed by SIGSEGV +++ > > The parameter, the same as the retval, seems to be bogus. > > Is it known (fixed in newer kernels)? > > thanks, Yes, its known, and a fix is there : https://lkml.org/lkml/2011/1/26/121 ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: epoll broken [was: mmotm 2011-01-25-15-47 uploaded] 2011-02-03 7:53 ` Eric Dumazet @ 2011-02-03 9:03 ` Jiri Slaby 0 siblings, 0 replies; 3+ messages in thread From: Jiri Slaby @ 2011-02-03 9:03 UTC (permalink / raw) To: Eric Dumazet; +Cc: linux-kernel, akpm, mm-commits, ML netdev, davidel On 02/03/2011 08:53 AM, Eric Dumazet wrote: >> {0, {u32=0, u64=0}} .............. {0, {u32=0, u64=0}}, ?} >> 0x7fb816996660, 8192, 0) = 379151968 >> 17836 --- SIGSEGV (Segmentation fault) @ 0 (0) --- >> 17836 +++ killed by SIGSEGV +++ >> >> The parameter, the same as the retval, seems to be bogus. >> >> Is it known (fixed in newer kernels)? >> >> thanks, > > Yes, its known, and a fix is there : https://lkml.org/lkml/2011/1/26/121 Thanks, it works indeed. -- js ^ permalink raw reply [flat|nested] 3+ messages in thread
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2011-02-03 7:53 ` Eric Dumazet
2011-02-03 9:03 ` Jiri Slaby
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