[linux-lvm] Re: [PATCH] per process request limits (was Re: IO scheduler, queue depth, nr_requests)

Nick Piggin piggin at cyberone.com.au
Thu Feb 19 20:40:00 UTC 2004

Andrew Morton wrote:

>Nick Piggin <piggin at cyberone.com.au> wrote:
>>Even with this patch, it might still be a good idea to allow
>>pdflush to disregard the limits...
>Has it been confirmed that pdflush is blocking in get_request_wait()?  I
>guess that can happen very occasionally because we don't bother with any
>locking around there but if it's happening a lot then something is bust.

Miquel's analysis is pretty plausible, but I'm not sure if
he's confirmed it or not, Miquel? Even if it isn't happening
a lot, and something isn't bust it might be a good idea to
do this.

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