| To: | open-iscsi@xxxxxxxxxxxxxxxx |
|---|---|
| Subject: | Re: [Ksummit-2005-discuss] Summary of 2005 Kernel Summit Proposed Topics |
| From: | Dmitry Yusupov <dmitry_yus@xxxxxxxxx> |
| Date: | Wed, 30 Mar 2005 09:39:43 -0800 |
| Cc: | Andi Kleen <ak@xxxxxx>, jamal <hadi@xxxxxxxxxx>, James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>, Rik van Riel <riel@xxxxxxxxxx>, andrea@xxxxxxx, michaelc@xxxxxxxxxxx, ksummit-2005-discuss@xxxxxxxxx, netdev <netdev@xxxxxxxxxxx> |
| In-reply-to: | <20050330172412.GP15453@xxxxxxxxx> |
| References: | <20050327054831.GA15453@xxxxxxxxx> <1111905181.4753.15.camel@mylaptop> <20050326224621.61f6d917.davem@xxxxxxxxxxxxx> <Pine.LNX.4.61.0503272245350.30885@xxxxxxxxxxxxxxxxxxxxxxxxxxx> <m1zmwn21hk.fsf@xxxxxx> <1112027284.5531.27.camel@mulgrave> <20050329152008.GD63268@xxxxxx> <1112116762.5088.65.camel@beastie> <1112130512.1077.107.camel@xxxxxxxxxxxxxxxx> <20050330152208.GB12672@xxxxxx> <20050330172412.GP15453@xxxxxxxxx> |
| Sender: | netdev-bounce@xxxxxxxxxxx |
On Wed, 2005-03-30 at 09:24 -0800, Matt Mackall wrote: > I seem to recall this being fairly easy to trigger by simply pulling > the network cable while there's heavy mmap + write load. The system > will quickly spiral down into OOM and will remain wedged when you plug > the network back in. With iSCSI, after some extended period all the > I/Os will have SCSI timeouts and lose everything. We've discussed that already. SCSI timeout logic just doesn't fit. (see rfc3720). For iSCSI, SCSI timeout logic *must* be disabled until iSCSI recovery is complete. host block/unblock logic in recent iSCSI transport patch will help to implement that. |
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