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Significance of SoftIRQs and Tasklets

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From	Ripunjay Tripathi <ripunjay.tripathi@gmail.com>
Newsgroups	comp.os.linux.development.system
Subject	Significance of SoftIRQs and Tasklets
Date	Sun, 21 Aug 2011 08:55:21 -0700 (PDT)
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While studying Linux interrupt handling I found that Tasklets and
SoftIRQs are two different methods of performing "bottom half" (lesser
priority work). I understand this (quite genuine need).

Difference being, SoftIRQs are re-entarant while a Tasklet is NOT.
That same SoftIRQ can run on different CPUs while this is NOT the case
with Tasklets.

Though I understand this from surface but I fail in understanding the
requirements of the two features. In what case(s) we may use these
facilities ?

Also what do we mean by Tasklets are made upon SoftIRQs ? In one of
the books I read, in LKML there were debates upon removing Tasklets. I
got completely confused why one would bring in such a feature ? Some
shortsightedness (No offense meant) ?

Any pointers on this will help a lot.


Thanks for your time :)
Ripunjay Tripathi

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Thread

Significance of SoftIRQs and Tasklets Ripunjay Tripathi <ripunjay.tripathi@gmail.com> - 2011-08-21 08:55 -0700
  Re: Significance of SoftIRQs and Tasklets Phil Carmody <thefatphil_demunged@yahoo.co.uk> - 2011-08-21 19:50 +0300
  Re: Significance of SoftIRQs and Tasklets "Ersek, Laszlo" <lacos@caesar.elte.hu> - 2011-08-22 20:24 +0200

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