process hangs on do_exit when oom happens

I looked up nothing useful with google,so I'm here for help.. when this happens: I use memcg to limit the memory use of a process,and when the memcg cgroup was out of memory, the process was oom-killed however,it cannot really complete the exiting. here is the some information OS versio

Question about page_size of x86_64

I found that my machine has a feature 'page size extension=true ' with 'cpuid' command but I don't know now to use it with linux.. anyone can give some help ? -- 使用 Opera 革命性的电子邮件客户程序: http://www.opera.com/mail/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the

compile a kernel for kgdb with less "optimized out"

I think those who use kgdb must hate this sentence "optimized out". I have tried many times to build a kernel with less optimization but failed. today,I found a trick method ,just get rid of the -O2 and -Os on the top level of the kernel source and add -O2 for the arch/x86 directory,it w

Re: question about IO-sched

thanks very much. 在 Wed, 18 Jul 2012 14:51:09 +0800，Corrado Zoccolo 写道: On Sun, Jul 15, 2012 at 9:08 AM, gaoqiang wrote: many thanks. but why the sys_read operation hangs on sync_page ? there are still many free memory.I mean ,the actually free memory,excluding the various kinds of

Re: question about IO-sched

aiting for reads (as Anticipatory in old kernels, and now CFQ) can achieve higher read to write ratios. Cheers Corrado On Thu, Jul 12, 2012 at 11:01 AM, gaoqiang wrote: Hi,all I have long known that deadline is read-prefered. but a simple test gives the opposite result.

question about IO-sched

Hi,all I have long known that deadline is read-prefered. but a simple test gives the opposite result. with two processes running at the same time,one for read and one for write.actually,they did nothing bug IO operation. while(true) { read();