EXT: Wayland/weston opens files in suspend/resume

[Ray, Ian (GE Healthcare)]

> On 22 Aug 2018, at 12.18, Teemu K <maillinglists18 at gmail.com> wrote:
> 
> Hi,
> 
> I have custom iMX6 based HW running image generated with Yocto 2.4
> (Wayland 2.0.0) and Linux kernel 4.1.x that I've been testing with
> suspend/resume cycles.
> 
> I noticed that after each suspend/resume cycle open file count
> increases. In my testing I got around 490 suspend/resume cycles until
> libwayland gave error that there is too many open files.

Hi,

f981d69553f52ca50aaf864bf821bb022ab7da82 fixes an fd leak, though I’m
not sure if it is relevant to your scenario.


> --
> [14:29:52.385] libwayland: dup failed: Too many open files
> [14:29:52.385] caught signal: 6
> The Wayland connection broke. Did the Wayland compositor die?
> --
> Looking at the lsof output after around 60 suspend/resume cycles I can
> see that for example this file appears 60 more times:
> --
> weston      921            root   11u      CHR       29,0      0t0
> 5323 /dev/fb0
> --
> 
> The 11u part changes, but other parts are same. First time there is
> 11u and 13u but later it goes all the way to 93u (some numbers are
> missing).
> 
> Also my QT application running when suspending keeps keeping these
> kinds of files open which I assume (I may be wrong) because the
> weston.
> 
> --
> qtapplicat   929  965       root   11u      REG       0,18    48097
> 12272 /run/user/root/weston-shared-24Zz9a (deleted)
> --
> 
> I know that the Weston is quite old since I think 4.0.0 has already
> come out,but is there any known bug that causes this? I did a search,
> but couldn't find any. I know it's rare to need suspend/resume over
> 400 times without cutting power at some point, but I'm sure there'll
> be that one customer that does it.
> 
> -Teemu K
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