作者查詢 / askacis
作者 askacis 在 PTT [ LinuxDev ] 看板的留言(推文), 共484則
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4F推:printk log level調一下基本上就可以關掉絕大部分了01/08 00:23
1F推:連續記憶體應該是DMA硬體的限制? 我知道有些DMA硬體可以11/15 11:41
2F→:設linking list丟給硬體,但實務上我還是拿連續記憶體餵他11/15 11:42
3F→:不然每次丟DMA之前還要建那串linking list table很麻煩XD11/15 11:43
1F推:google Bulk only protocol,mass storage device的driver09/03 09:24
2F→:會自己Create 一個kernel thread去維護state machinne~09/03 09:25
9F推:先載入的driver export出一個complete變數,然後等待B06/14 23:30
10F→:driver來complet driver A的這個變數,這樣A就可以往下走06/14 23:30
5F推:恭喜~不過還是建立不用root寫code的習慣吧~真的要用root06/06 13:35
6F推:用sudo 頂多就是把不用輸入密碼的權限開出來~06/06 14:38
3F推:kernel config要打開CONFIG_KALLSYMS05/17 00:28
1F推:可以用vmalloc換掉kmalloc,只是效能可能會掉~~05/05 00:12
2F推:或是你就乾脆要32K~~好像都是一些餿主意XD05/05 00:15
2F推:你的PROG要先跑OBJS,產生OBJS的時候就要帶LDFLAGS進去了04/05 17:25
3F→:不是到最後產生執行檔的時候才帶進去~04/05 17:26
4F推:仔細看已經產生entry.o了~上面我腦殘請無視~~Orz04/05 17:30
4F推:http://blog.richliu.com/2009/12/11/822/04/03 10:47
5F→:看你的log死在要skb_buffer的時候,可以印出來看要多大~04/03 10:48
6F推:[<c0379b7c>] __mod_vermagic5+0x6a7c/0x772c [ue_lte]04/03 10:50
7F→:[<8017a148>] __alloc_skb+0x70/0x14004/03 10:50
8F→:所以要看一下你ue_lte.ko裡面的相關function~04/03 10:51
1F→:userspace呼叫read system call會到driver的read function03/23 02:43
2F→:查一下搞不好你的fd 被close掉了~03/23 02:43