Messages in this thread Patch in this message | | | Date | Sat, 19 Aug 2006 12:05:50 +0200 | From | Baurzhan Ismagulov <> | Subject | Re: Help: error 514 in select() |
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Hello Misha,
On Fri, Aug 18, 2006 at 07:37:50PM -0700, Misha Sushchik wrote: > I am writing to you because I found a post by you in a newsgroup that > described improper error reporting by select(), reporting error 514.
So if you don't mind, I'm taking this to linux-kernel, please answer to the list and Cc to me.
> We recently tried to upgrade our server from RedHat 7 to RHEL 4, with > kernel version 2.6.9. Our CORBA-based communication now is halted now > and then due to "unknown error 514" in select().
include/linux/errno.h says user space should never see this error code, so this is a bug in your kernel. core_sys_select returns this code if a signal is pending for the current process. You have the following options:
* Test with the latest kernel. 2.6.9 is almost two years old.
* Ask RedHat to fix the problem in 2.6.9.
* Fix the problem yourself.
You may try applying something like the following to your current kernel in order to understand how to reproduce the problem (untested):
diff -Naurp linux-2.6.orig/fs/select.c linux-2.6/fs/select.c --- linux-2.6.orig/fs/select.c 2006-08-19 11:57:53.000000000 +0200 +++ linux-2.6/fs/select.c 2006-08-19 11:57:43.000000000 +0200 @@ -430,6 +430,8 @@ asmlinkage long sys_select(int n, fd_set } } + if (ret == -ERESTARTNOHAND) + BUG(); return ret; } IIUC, this should print a backtrace every time the problem occurs.
With kind regards, Baurzhan. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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