On Thu, Jun 15, 2017 at 7:37 AM, <pmor...@gmail.com> wrote:
>
> With go1.9beta1 (Linux / amd64) I noticed an extra file descriptor that I
> cannot explain.
> A simple example is after calling ioutil.ReadDir().
>
> package main
> import (
>
> "fmt"
>
> "io/ioutil"
>
> )
>
> func main() {
>
> _, err := ioutil.ReadDir(".")
>
> if err != nil {
>
> panic(err)
>
> }
>
> fmt.Scanln()
>
> }
>
>
> sudo lsof -p `pidof fd-go1.9beta1`
> COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
> fd-go1.9b 3698 peter cwd DIR 8,2 4096 23596911
> /home/peter/go/src/fd
> fd-go1.9b 3698 peter rtd DIR 8,2 4096 2 /
> fd-go1.9b 3698 peter txt REG 8,2 1964089 23596832
> /home/peter/go/src/fd/fd-go1.9beta1
> fd-go1.9b 3698 peter 0u CHR 136,1 0t0 4 /dev/pts/1
> fd-go1.9b 3698 peter 1u CHR 136,1 0t0 4 /dev/pts/1
> fd-go1.9b 3698 peter 2u CHR 136,1 0t0 4 /dev/pts/1
> fd-go1.9b 3698 peter 4u a_inode 0,12 0 9667 [eventpoll]
>
> FD #4 doesn't show up with go1.8.3. Is this expected, a bug or something
> else?
In 1.9 the os package now uses the event poller that the net package
has always used.
I sent https://golang.org/cl/45910 to add that to the release notes.
Ian
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