Monthly Archives: August 2015

cool storage startups

Portworx: Container-aware Storage

Hedvig: Distributed Storage Platform

Infinidat: Advanced Unified Storage Solution

NexGen Storage: PCIe Flash Acceleration

Cohesity: Converged Secondary Storage Solution

Qumulo: Data-Aware Scale-Out NAS Solution

first IO request stack

[ 0.901606] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.2.0-rc4-00004-gb31e5ec-dirty #76
[ 0.902578] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.8.2-0-g33fbe13 by qemu-project.org 04/01/2014
[ 0.904016] ffff88001e940000 ffff88001e94b648 ffffffff816d98f5 0000000000000001
[ 0.905287] ffff88001ebaea00 ffff88001e94b658 ffffffff814899e0 ffff88001e94b688
[ 0.906637] ffffffff813eae8d 0000000000000000 0000000000000000 ffff88001ebaea00
[ 0.908775] Call Trace:
[ 0.909189] [<ffffffff816d98f5>] dump_stack+0x4f/0x7b
[ 0.909810] [<ffffffff814899e0>] virtnvme_make_request+0x23/0x25
[ 0.910511] [<ffffffff813eae8d>] generic_make_request+0x9c/0xdb
[ 0.911222] [<ffffffff813eafc2>] submit_bio+0xf6/0x134
[ 0.911845] [<ffffffff811889b7>] submit_bh_wbc.isra.32+0x113/0x11e
[ 0.912012] [<ffffffff811889e2>] submit_bh+0x10/0x12
[ 0.912620] [<ffffffff81188d3b>] block_read_full_page+0x2ae/0x2ca
[ 0.913323] [<ffffffff8118a971>] ? I_BDEV+0x12/0x12
[ 0.913961] [<ffffffff814233da>] ? debug_smp_processor_id+0x17/0x19
[ 0.914690] [<ffffffff81117e51>] ? __lru_cache_add+0x72/0x87
[ 0.915371] [<ffffffff8118b182>] ? blkdev_readpages+0x1f/0x1f
[ 0.916012] [<ffffffff8118b19a>] blkdev_readpage+0x18/0x1a
[ 0.916737] [<ffffffff8110ab04>] do_read_cache_page+0x94/0x189
[ 0.917460] [<ffffffff8110ac15>] read_cache_page+0x1c/0x1e
[ 0.918209] [<ffffffff813fcf76>] read_dev_sector+0x30/0x8a
[ 0.918877] [<ffffffff813ffe54>] read_lba+0xb1/0x105
[ 0.920012] [<ffffffff814002b5>] ? find_valid_gpt+0x80/0x4d4
[ 0.920689] [<ffffffff814002d6>] find_valid_gpt+0xa1/0x4d4
[ 0.921354] [<ffffffff81413cd0>] ? string.isra.3+0x3d/0xa2
[ 0.922008] [<ffffffff81112628>] ? __alloc_pages_nodemask+0x905/0xa49
[ 0.924018] [<ffffffff81400785>] efi_partition+0x7c/0x364
[ 0.924699] [<ffffffff8141519a>] ? vsnprintf+0x87/0x3ab
[ 0.925351] [<ffffffff81415564>] ? snprintf+0x34/0x36
[ 0.926015] [<ffffffff813fe343>] check_partition+0x11e/0x1b8
[ 0.926689] [<ffffffff813fd51c>] rescan_partitions+0x98/0x29d
[ 0.927370] [<ffffffff8118c05e>] __blkdev_get+0x1c4/0x3db
[ 0.928013] [<ffffffff8116eb26>] ? unlock_new_inode+0x23/0x66
[ 0.928690] [<ffffffff8118c2d3>] blkdev_get+0x5e/0x2e4
[ 0.929307] [<ffffffff8116eb64>] ? unlock_new_inode+0x61/0x66
[ 0.930012] [<ffffffff8118b067>] ? bdget+0x127/0x136
[ 0.930617] [<ffffffff813f9938>] ? disk_get_part+0x1b/0x17f
[ 0.931268] [<ffffffff81474d1b>] ? put_device+0x17/0x19
[ 0.932013] [<ffffffff813fb1b3>] add_disk+0x2dd/0x452
[ 0.932632] [<ffffffff8148a0ab>] virtnvme_probe+0x660/0x6ef
[ 0.933287] [<ffffffff81448106>] virtio_dev_probe+0x156/0x1ee
[ 0.933990] [<ffffffff8147861d>] ? driver_sysfs_add+0x73/0x98
[ 0.934669] [<ffffffff81478cf2>] driver_probe_device+0x152/0x374
[ 0.935365] [<ffffffff81478f76>] __driver_attach+0x62/0x85
[ 0.936017] [<ffffffff81478f14>] ? driver_probe_device+0x374/0x374
[ 0.936734] [<ffffffff81476fb6>] bus_for_each_dev+0x80/0x8a
[ 0.937456] [<ffffffff8147879f>] driver_attach+0x1e/0x20
[ 0.938209] [<ffffffff8147834a>] bus_add_driver+0x13e/0x241
[ 0.938873] [<ffffffff8147958e>] driver_register+0x8f/0xcc
[ 0.940016] [<ffffffff81f2b93a>] ? init+0x8b/0x8b
[ 0.940607] [<ffffffff81448423>] register_virtio_driver+0x2b/0x2d
[ 0.941317] [<ffffffff81f2b964>] init+0x2a/0x4a
[ 0.941889] [<ffffffff81f2b93a>] ? init+0x8b/0x8b
[ 0.942546] [<ffffffff8100032c>] do_one_initcall+0xfe/0x187
[ 0.943201] [<ffffffff81eeb08c>] kernel_init_freeable+0x1c1/0x24e
[ 0.944014] [<ffffffff81eea7cd>] ? initcall_blacklist+0xb7/0xb7
[ 0.944711] [<ffffffff816d2017>] ? rest_init+0x13e/0x13e
[ 0.945350] [<ffffffff816d2025>] kernel_init+0xe/0xda
[ 0.945966] [<ffffffff816e25ff>] ret_from_fork+0x3f/0x70
[ 0.946629] [<ffffffff816d2017>] ? rest_init+0x13e/0x13e