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Date: Mon, 08 Mar 2010 16:43:42 -0500 From: Jeff Moyer <jmoyer@...hat.com> To: Michael Tokarev <mjt@....msk.ru> Cc: linux-aio@...ck.org, Linux-kernel <linux-kernel@...r.kernel.org> Subject: Re: aio: compat_ioctl issue? Michael Tokarev <mjt@....msk.ru> writes: > Hello. > > I just come across a situation (next in a long row :) > when on x86, 32bit userspace does not work with 64bit > kernel. This time this is about aio requests. > > An application submits some aio job, and it is returned > immediately (from io_getevents()) with EINVAL error. > Here's what it does (it's a printf in the application - > actual arguments as passed to io_submit() and actual > result received in io_getevents()): > > io_submit: lio_opcode=7 reqprio=0 iov=0x9cd7018{0xf5599000,4096}, niov=1, offset=0 > io_getevents: expected 4096 got -22 (EINVAL) > > Note that it is not io_submit() which fails (that one > returns success) but io_getevents(), so it has to be > down the pipeline somewhere. > > Can someone comment this please? Somehow I was thinking this > codepath works as - I think anyway - I ran 32bit Oracle database > with aio support on 64bit kernel, but I may be mistaken. > > Kernel is 2.6.33 from kernel.org. Can you post the program, please? Thanks, Jeff -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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