Re: [PATCH 1/1] eventfd: implementation of EFD_MASK flag

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Martin Sustrik <sustrik@xxxxxxxxxx> wrote:
> On 07/02/13 23:44, Andrew Morton wrote:
> >That's a nice changelog but it omitted a critical thing: why do you
> >think the kernel needs this feature?  What's the value and use case for
> >being able to poll these descriptors?
> 
> To address the question, I've written down detailed description of
> the challenges of the network protocol development in user space and
> how the proposed feature addresses the problems.
> 
> It's too long to fit into ChangeLog, but it may be worth reading
> when trying to judge the merit of the patch.
> 
> It can be found here: http://www.250bpm.com/blog:16

Using one eventfd per userspace socket still seems a bit wasteful.

Couldn't you use a single pipe for all sockets and write the efd_mask to
the pipe for each socket?

A read from the pipe would behave like epoll_wait.

You might need to use one-shot semantics; but that's probably
the easiest thing in multithreaded apps anyways.
--
To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [Linux Ext4 Filesystem]     [Union Filesystem]     [Filesystem Testing]     [Ceph Users]     [Ecryptfs]     [AutoFS]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux Cachefs]     [Reiser Filesystem]     [Linux RAID]     [Samba]     [Device Mapper]     [CEPH Development]
  Powered by Linux