Re: posible latency issues in seq_read

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To: Eric Dumazet <[email protected]>
Subject: Re: posible latency issues in seq_read
From: "Chris Friesen" <[email protected]>
Date: Mon, 23 Jul 2007 11:45:46 -0600
Cc: Lee Revell <[email protected]>, [email protected], [email protected]
In-reply-to: <[email protected]>
References: <[email protected]> <[email protected]> <[email protected]> <[email protected]>
Sender: [email protected]
User-agent: Mozilla Thunderbird 1.0.2-6 (X11/20050513)

Eric Dumazet wrote:

The problem is in established_get_next() and established_get_first() notallowing softirq processing, while scanning a possibly huge hash table,even if few sockets are hashed in.
As cond_resched_softirq() was added in linux-2.6.11, you probably *need*to check the diffs between linux-2.6.10 & linux-2.6.11


Thanks for the pointers to the likely culprits.

Chris
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References:
- posible latency issues in seq_read
  - From: "Chris Friesen" <[email protected]>
- Re: posible latency issues in seq_read
  - From: "Lee Revell" <[email protected]>
- Re: posible latency issues in seq_read
  - From: "Chris Friesen" <[email protected]>
- Re: posible latency issues in seq_read
  - From: Eric Dumazet <[email protected]>

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