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Date:	Thu, 10 Jul 2014 11:11:10 -0400
From:	Jeff Moyer <>
To:	Benjamin LaHaise <>
Cc:	"Elliott\, Robert \(Server Storage\)" <>,
	Jens Axboe <>,
	Christoph Hellwig <>,
	"dgilbert\" <>,
	James Bottomley <>,
	Bart Van Assche <>,
	"linux-scsi\" <>,
	"linux-kernel\" <>
Subject: Re: scsi-mq V2

Benjamin LaHaise <> writes:

>> [  186.339064] ioctx_alloc: nr_events=-2 aio_max_nr=65536
>> [  186.339065] ioctx_alloc: nr_events=-2 aio_max_nr=65536
>> [  186.339067] ioctx_alloc: nr_events=-2 aio_max_nr=65536
>> [  186.339068] ioctx_alloc: nr_events=-2 aio_max_nr=65536
>> [  186.339069] ioctx_alloc: nr_events=-2 aio_max_nr=65536
> Something is horribly wrong here.  There is no way that value for nr_events 
> should be passed in to ioctx_alloc().  This implies that userland is calling 
> io_setup() with an impossibly large value for nr_events.  Can you post the 
> actual diff for your fs/aio.c relative to linus' tree?

fio does exactly this!  it passes INT_MAX.

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