From: Mike Christie <mchristie-5c4llco8/ftWk0Htik3J/w@public.gmane.org>
To: NeilBrown <neilb-l3A5Bk7waGM@public.gmane.org>
Cc: Christoph Hellwig <hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
Jens Axboe <axboe-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org>,
Alexander Viro
<viro-RmSDqhL/yNMiFSDQTTA3OLVCufUGDwFn@public.gmane.org>,
Linus Torvalds
<torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-man-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: SuSE O_DIRECT|O_NONBLOCK overload
Date: Fri, 14 Mar 2014 12:46:43 -0500 [thread overview]
Message-ID: <53234083.3060307@fusionio.com> (raw)
In-Reply-To: <20140313111555.2f15f19f-wvvUuzkyo1EYVZTmpyfIwg@public.gmane.org>
On 03/12/2014 07:15 PM, NeilBrown wrote:
> I also think there should probably be just one FAILFAST flag. Where it was
> the DEV or the TRANSPORT or the DRIVER that failed could be returned in the
> error code for any caller that cared. But as I don't know why the one became
> three I could well be missing something important.
It was for multipath. The problem was dm-multipath does not know what to
do with low level device errors, but wanted transport errors returned
quickly. Other drivers like the scsi_dh (formerly dm hardware handlers)
modules, want all errors fast failed.
I can add documentation or we can just change the code to better suite
your needs.
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prev parent reply other threads:[~2014-03-14 17:46 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20140130132620.GA6031@infradead.org>
[not found] ` <20140130132630.GB6031@infradead.org>
[not found] ` <x49iorp3fhm.fsf@segfault.boston.devel.redhat.com>
[not found] ` <20140308155240.GA32297@infradead.org>
[not found] ` <CAMM=eLewbtK7LiNZCXo=hm-sjVU2+MN+xTFuxb89mDA1iS3r0w@mail.gmail.com>
[not found] ` <531B74B6.4070004@suse.de>
[not found] ` <20140312102849.GA26509@infradead.org>
[not found] ` <53203BE5.402@suse.de>
[not found] ` <53203BE5.402-l3A5Bk7waGM@public.gmane.org>
2014-03-12 11:00 ` SuSE O_DIRECT|O_NONBLOCK overload Christoph Hellwig
[not found] ` <20140312110015.GA29907-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2014-03-13 0:15 ` NeilBrown
[not found] ` <20140313111555.2f15f19f-wvvUuzkyo1EYVZTmpyfIwg@public.gmane.org>
2014-03-14 17:46 ` Mike Christie [this message]
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