Messages in this thread | | | Date | Fri, 9 Aug 2013 23:11:26 +0200 | From | Andi Kleen <> | Subject | pty FIONREAD returning zero breaks emacs in 3.11rc3 |
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When I run emacs over ssh terminal (no X) on 3.11-rc3 it often ignores key strokes. I first thought the system was busy or so, but when stracing the emacs it was not blocked.
Here's a typical sequence. select/SIGIO wakes it up, but then FIONREAD returns 0.
I'm not fully sure when it started.
It does not happen all the time, but is quite frequent.
ioctl(3, FIONREAD, [0]) = 0 pselect6(4, [3], [], NULL, {17, 952336932}, {NULL, 8}) = 1 (in [3], left {17, 504942810}) --- SIGIO {si_signo=SIGIO, si_code=SI_KERNEL} --- rt_sigreturn() = 1 ioctl(3, FIONREAD, [0]) = 0 ioctl(3, FIONREAD, [0]) = 0 pselect6(4, [3], [], NULL, {17, 504298807}, {NULL, 8}) = ? ERESTARTNOHAND (Interrupted by signal) --- SIGIO {si_signo=SIGIO, si_code=SI_KERNEL} --- rt_sigreturn() = -1 EINTR (Interrupted system call) ioctl(3, FIONREAD, [0]) = 0 pselect6(4, [3], [], NULL, {17, 103972440}, {NULL, 8}) = 1 (in [3], left {16, 864890560}) --- SIGIO {si_signo=SIGIO, si_code=SI_KERNEL} --- rt_sigreturn() = 1
-- ak@linux.intel.com -- Speaking for myself only.
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