From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sagi Grimberg Subject: Re: 4.5-rc iser issues Date: Sun, 14 Feb 2016 11:02:12 +0200 Message-ID: <56C04294.3090701@dev.mellanox.co.il> References: <20160214074119.GA24558@infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20160214074119.GA24558-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Christoph Hellwig Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-rdma@vger.kernel.org > iSER on 4.5-rc3 seems to fall over pretty quickly for me. The > test is a a single LUN, against a Linux iSER target, also running > 4.5-rc. Both are usinx mlx4 hardware. These messages appear > immediately when running xfstests on xfs (but not during mkfs.xfs), > and after a few dozend tests with ext4, and ultimiately lock up the > system: > > Feb 13 13:33:57 redstar37 kernel: [ 566.871038] iser: iser_fast_reg_fmr: ib_fmr_pool_map_phys failed: -22 > Feb 13 13:33:57 redstar37 kernel: [ 566.878278] iser: iser_prepare_read_cmd: Failed to set up Data-IN RDMA > Feb 13 13:33:57 redstar37 kernel: [ 566.885604] iser: iser_send_command: conn ffff8809261bbb28 failed task->itt 5 err -22 > Feb 13 13:33:57 redstar37 kernel: [ 566.899804] iser: iser_fast_reg_fmr: ib_fmr_pool_map_phys failed: -22 > Feb 13 13:33:57 redstar37 kernel: [ 566.907037] iser: iser_prepare_read_cmd: Failed to set up Data-IN RDMA > Feb 13 13:33:57 redstar37 kernel: [ 566.914355] iser: iser_send_command: conn ffff8809261bbb28 failed task->itt 6 err -22 > > When hacking the initiator to use FRs instead of FMRs I get something > fairly similar: > > Feb 13 22:49:18 redstar37 kernel: [ 277.500477] iser: iser_fast_reg_mr: failed to map sg (5/6) > Feb 13 22:49:18 redstar37 kernel: [ 277.506679] iser: iser_prepare_write_cmd: Failed to register write cmd RDMA mem > Feb 13 22:49:18 redstar37 kernel: [ 277.514906] iser: iser_send_command: conn ffff88091ac8cb28 failed task->itt 59 err -22 > Feb 13 22:49:18 redstar37 kernel: [ 277.529614] iser: iser_fast_reg_mr: failed to map sg (5/6) > Feb 13 22:49:18 redstar37 kernel: [ 277.535785] iser: iser_prepare_write_cmd: Failed to register write cmd RDMA mem > Feb 13 22:49:18 redstar37 kernel: [ 277.544006] iser: iser_send_command: conn ffff88091ac8cb28 failed task->itt 29 err -22 > Feb 13 22:49:18 redstar37 kernel: [ 277.558669] iser: iser_fast_reg_mr: failed to map sg (5/6) > Feb 13 22:49:18 redstar37 kernel: [ 277.564844] iser: iser_prepare_write_cmd: Failed to register write cmd RDMA mem > Feb 13 22:49:18 redstar37 kernel: [ 277.573069] iser: iser_send_command: conn ffff88091ac8cb28 failed task->itt 78 err -22 > Feb 13 22:49:18 redstar37 kernel: [ 277.587677] iser: iser_fast_reg_mr: failed to map sg (5/6) > > The only other kernel version I had available quickly is 3.16 from Debian > Jessie, and that works fine. Thanks for reporting, I'll have a look. I suspect this is coming from Keith+Ming changes in blk_bio_segment_split()... -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html