Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3

From: Evgeniy Polyakov
Date: Thu Feb 22 2007 - 10:05:59 EST

On Thu, Feb 22, 2007 at 06:47:04AM -0800, David Miller (davem@xxxxxxxxxxxxx) wrote:
> As a side note although Evgeniy likes M:N threading model ideas, they
> are a mine field wrt. signal semantics. Solaris guys took several
> years to get it right, just grep through the Solaris kernel patch
> readme files over the years to get an idea of how bad it can be. I
> would therefore never advocate such an approach.

I have fully synchronous kevent signal delivery for that purpose :)
Having all events synchronous allows trivial handling of them -
including signals.

> The more I think about it, a reasonable solution might actually be to
> use threadlets for disk I/O and pure event based processing for
> networking. It is two different handling paths and non-unified,
> but that might be the price for good performance :-)

Hmm, yes, for such scenario we need some kind of event delivery
mechanism, which would allow to wait on different kinds of events.

In the above sentence I see known to pain letters -
letter k
letter e
letter v
letter e
letter n
letter t

Or more modern trend - async_wait(epoll).

Evgeniy Polyakov
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