Now, have checking non-FAST handler. Have some interest moments, such as error codes, like: Short write: 0/15 (Programming error) Write to 137 (fdno) failed: Programming error Maybe server becomes overloaded? (4xE1, Xeon 3G)
Best regards, Konstantin Prokazoff Center Of Excellence, S_V_R Ltd., Kyiv HQs, Ukraine Official business-partner & DevConnect member of Avaya Inc. Regional development & support center of Digium Inc. Tel. +38 044 594 1781, ext. 1038 Fax. +38 044 234 0455 ----- Original Message ----- From: "John Baldwin" <[EMAIL PROTECTED]> To: <freebsd-hackers@freebsd.org> Cc: "Konstantin Prokazoff" <[EMAIL PROTECTED]> Sent: Monday, November 21, 2005 5:38 PM Subject: Re: poll()/select() > On Monday 21 November 2005 08:14 am, Konstantin Prokazoff wrote: > > Thanks for comment, > > > > I think, after kernel inspection, problem (maybe) in preemption. While > > syscall to poll or select holds sellock, and if another thread (process) > > tries to syscall or we have taken interrupt (where handler use > > selrecord/selwakeup too), kernel will deadlock. > > I have this situation cause to INTR_FAST interrupt handler in device > > driver for Digium's PCI board, which provides 4 T1/E1 interfaces. Problem > > 100% repetitive. > > Another way to avoid such deadlock - provide different kthread/ithreads > > for select/poll mechanism. > > You can't call selwakeup() from an INTR_FAST handler. Try removing INTR_FAST > and see if it fixes your issue. If you want to use INTR_FAST, then realize > that you can only use spin mutexes in your handler, and that any more > complicated work like selwakeup() that uses regular mutexes will have to be > deferred either by using a swi handler or dispatching a task to the Fast > taskqueue. > > -- > John Baldwin <[EMAIL PROTECTED]> <>< http://www.FreeBSD.org/~jhb/ > "Power Users Use the Power to Serve" = http://www.FreeBSD.org _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"