Re: FDs & linux again.

Pawel Pierscionek wrote:
>
> Hi,
>
> HN> First of all poll is not implemented in 2.0.35. It will be (or is) in
> HN> Linux 2.2, if your libc has a proper kernel call for it.
> It's funny, because my system is more stable with poll emulation than
> with select.
>
> >> This is what squid says before I kill it :
> >> comm_poll: poll failure: (12) Cannot allocate memory
>
> HN> You are probably running out of memory or the poll emulation in libc
> gets upsed by FDs >> 256 (quite likely actually).
>
> Yes, but it happens near FD no. 170 (poll | select).
> I have somewhere beetween 60-120MB + 250 MB swap free at the time!
>
> Pawel,

Sounds like your kernel's FD_SETSIZE is larger than the value of same
that your application was compiled with. I believe that that can cause
memory overruns in your application that can cause this sort of
behaviour.

I should think it's safe for the application's value to be higher than
the kernel's, but dangerous to the life of the app to have it the other
way around.

D
Received on Mon Jan 11 1999 - 16:10:34 MST