Re: [PATCH V2 1/1] net: cdc_ncm: Reduce memory use when kernel memory low

2017-07-03 Thread David Miller
From: Jim Baxter Date: Wed, 28 Jun 2017 21:35:29 +0100 > The CDC-NCM driver can require large amounts of memory to create > skb's and this can be a problem when the memory becomes fragmented. > > This especially affects embedded systems that have constrained > resources but wish to maximise the

Re: [PATCH V2 1/1] net: cdc_ncm: Reduce memory use when kernel memory low

2017-06-30 Thread Bjørn Mork
"Baxter, Jim" writes: > I tested this with printk's to show when the low memory code was triggered > and the value of ctx->tx_low_mem_val and ctx->tx_low_mem_max_cnt. > I created a workqueue that slowly used up the atomic memory until the > code is triggered. > > I could add debug prints, though

Re: [PATCH V2 1/1] net: cdc_ncm: Reduce memory use when kernel memory low

2017-06-30 Thread Baxter, Jim
> Jim Baxter writes: > >> The CDC-NCM driver can require large amounts of memory to create >> skb's and this can be a problem when the memory becomes fragmented. >> >> This especially affects embedded systems that have constrained >> resources but wish to maximise the throughput of CDC-NCM with

Re: [PATCH V2 1/1] net: cdc_ncm: Reduce memory use when kernel memory low

2017-06-30 Thread Bjørn Mork
Jim Baxter writes: > The CDC-NCM driver can require large amounts of memory to create > skb's and this can be a problem when the memory becomes fragmented. > > This especially affects embedded systems that have constrained > resources but wish to maximise the throughput of CDC-NCM with 16KiB > NT

Re: [PATCH V2 1/1] net: cdc_ncm: Reduce memory use when kernel memory low

2017-06-30 Thread Baxter, Jim
...@mork.no, david.lai...@aculab.com Subject: Re: [PATCH V2 1/1] net: cdc_ncm: Reduce memory use when kernel memory low > From: Jim Baxter > Date: Wed, 28 Jun 2017 21:35:29 +0100 > >> The CDC-NCM driver can require large amounts of memory to create >> skb's and this

Re: [PATCH V2 1/1] net: cdc_ncm: Reduce memory use when kernel memory low

2017-06-30 Thread David Miller
From: Jim Baxter Date: Wed, 28 Jun 2017 21:35:29 +0100 > The CDC-NCM driver can require large amounts of memory to create > skb's and this can be a problem when the memory becomes fragmented. > > This especially affects embedded systems that have constrained > resources but wish to maximise the

[PATCH V2 1/1] net: cdc_ncm: Reduce memory use when kernel memory low

2017-06-28 Thread Jim Baxter
The CDC-NCM driver can require large amounts of memory to create skb's and this can be a problem when the memory becomes fragmented. This especially affects embedded systems that have constrained resources but wish to maximise the throughput of CDC-NCM with 16KiB NTB's. The issue is after running