* Maximum packet size in kernel @ 2004-12-02 9:44 cranium2003 2004-12-04 22:05 ` global memory access Lan Xue 0 siblings, 1 reply; 3+ messages in thread From: cranium2003 @ 2004-12-02 9:44 UTC (permalink / raw) To: kernerl mail; +Cc: net dev hello, I want to know how much maximum packet size is assigned by alloc_skb in kernel? and is there any extra space remains in packet allocated memory? Does it dependent on CPU cache? regards, cranium. __________________________________ Do you Yahoo!? The all-new My Yahoo! - What will yours do? http://my.yahoo.com ^ permalink raw reply [flat|nested] 3+ messages in thread
* global memory access 2004-12-02 9:44 Maximum packet size in kernel cranium2003 @ 2004-12-04 22:05 ` Lan Xue 2004-12-05 0:47 ` Tommy Reynolds 0 siblings, 1 reply; 3+ messages in thread From: Lan Xue @ 2004-12-04 22:05 UTC (permalink / raw) To: netdev; +Cc: kernerl mail Hi, I was wondering how a user-level program can share a writable memory buffer with the kernel. The memory can either belongs to the kernel space or the user space, but both kernel module and user program should be able to access(read, write) it. Any hint? Many thanks, Lan ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: global memory access 2004-12-04 22:05 ` global memory access Lan Xue @ 2004-12-05 0:47 ` Tommy Reynolds 0 siblings, 0 replies; 3+ messages in thread From: Tommy Reynolds @ 2004-12-05 0:47 UTC (permalink / raw) To: linux-kernel Uttered Lan Xue <lanxue@soe.ucsc.edu>, spake thus: > I was wondering how a user-level program can share a writable memory > buffer with the kernel. The memory can either belongs to the kernel space > or the user space, but both kernel module and user program should be able > to access(read, write) it. $ man 2 mmap Cheers! ^ permalink raw reply [flat|nested] 3+ messages in thread
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