Re: posible latency issues in seq_read

2007-07-23 Thread Chris Friesen
Eric Dumazet wrote: The problem is in established_get_next() and established_get_first() not allowing 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

Re: posible latency issues in seq_read

2007-07-23 Thread Chris Friesen
Eric Dumazet wrote: The problem is in established_get_next() and established_get_first() not allowing 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

Re: posible latency issues in seq_read

2007-07-20 Thread Eric Dumazet
Chris Friesen a écrit : Lee Revell wrote: On 7/20/07, Chris Friesen <[EMAIL PROTECTED]> wrote: We've run into an issue (on 2.6.10) where calling "lsof" triggers lost packets on our server. Preempt is disabled, and NAPI is enabled. Can you reproduce with a recent kernel? Lots of latency

Re: posible latency issues in seq_read

2007-07-20 Thread Chris Friesen
Lee Revell wrote: On 7/20/07, Chris Friesen <[EMAIL PROTECTED]> wrote: We've run into an issue (on 2.6.10) where calling "lsof" triggers lost packets on our server. Preempt is disabled, and NAPI is enabled. Can you reproduce with a recent kernel? Lots of latency issues have been fixed

Re: posible latency issues in seq_read

2007-07-20 Thread Lee Revell
On 7/20/07, Chris Friesen <[EMAIL PROTECTED]> wrote: We've run into an issue (on 2.6.10) where calling "lsof" triggers lost packets on our server. Preempt is disabled, and NAPI is enabled. Can you reproduce with a recent kernel? Lots of latency issues have been fixed since then. Lee - To

Re: posible latency issues in seq_read

2007-07-20 Thread Lee Revell
On 7/20/07, Chris Friesen [EMAIL PROTECTED] wrote: We've run into an issue (on 2.6.10) where calling lsof triggers lost packets on our server. Preempt is disabled, and NAPI is enabled. Can you reproduce with a recent kernel? Lots of latency issues have been fixed since then. Lee - To

Re: posible latency issues in seq_read

2007-07-20 Thread Chris Friesen
Lee Revell wrote: On 7/20/07, Chris Friesen [EMAIL PROTECTED] wrote: We've run into an issue (on 2.6.10) where calling lsof triggers lost packets on our server. Preempt is disabled, and NAPI is enabled. Can you reproduce with a recent kernel? Lots of latency issues have been fixed since

Re: posible latency issues in seq_read

2007-07-20 Thread Eric Dumazet
Chris Friesen a écrit : Lee Revell wrote: On 7/20/07, Chris Friesen [EMAIL PROTECTED] wrote: We've run into an issue (on 2.6.10) where calling lsof triggers lost packets on our server. Preempt is disabled, and NAPI is enabled. Can you reproduce with a recent kernel? Lots of latency