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This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Tags added: raring
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https://bugs.launchpad.net/bugs/1206837
Title:
Ubuntu Raring Kernel - pull patch block/partitions: optimize memory
allocation in check_partition
Status in “linux” package in Ubuntu:
Incomplete
Bug description:
We have a Ubuntu Raring server running kernel 3.8.13-030813-generic
We use iscsi to consume LUNs out of a storage array in the backend.
When the server is loaded we run into the issue of iSCSI device
discovery failing to scan partitions on LUNs with
Jul 30 12:12:01 srv1 kernel: [101661.119322] kworker/u:20: page allocation
failure: order:4, mode:0x10c0d0
Jul 30 12:12:01 srv1 kernel: [101661.119327] Pid: 32539, comm: kworker/u:20
Tainted: GF W O 3.8.13-030813-generic #201305111843
Jul 30 12:12:01 srv1 kernel: [101661.119329] Call Trace:
Jul 30 12:12:01 srv1 kernel: [101661.119340] [<ffffffff8113ac96>]
warn_alloc_failed+0xf6/0x150
Jul 30 12:12:01 srv1 kernel: [101661.119345] [<ffffffff8113e156>] ?
drain_local_pages+0x16/0x20
Jul 30 12:12:01 srv1 kernel: [101661.119350] [<ffffffff810bc8e0>] ?
on_each_cpu_mask+0x50/0x70
Jul 30 12:12:01 srv1 kernel: [101661.119354] [<ffffffff8113e8ce>]
__alloc_pages_nodemask+0x76e/0x9b0
Jul 30 12:12:01 srv1 kernel: [101661.119359] [<ffffffff8117af3a>]
alloc_pages_current+0xba/0x170
Jul 30 12:12:01 srv1 kernel: [101661.119363] [<ffffffff81139aae>]
__get_free_pages+0xe/0x40
Jul 30 12:12:01 srv1 kernel: [101661.119367] [<ffffffff8118427f>]
kmalloc_order_trace+0x3f/0xd0
Jul 30 12:12:01 srv1 kernel: [101661.119373] [<ffffffff8133af30>]
check_partition+0x30/0x200
Jul 30 12:12:01 srv1 kernel: [101661.119376] [<ffffffff8133ac58>]
rescan_partitions+0xb8/0x2b0
Jul 30 12:12:01 srv1 kernel: [101661.119381] [<ffffffff811d52cb>]
__blkdev_get+0x39b/0x480
Jul 30 12:12:01 srv1 kernel: [101661.119386] [<ffffffff8107f7eb>] ?
bit_waitqueue+0x1b/0xc0
Jul 30 12:12:01 srv1 kernel: [101661.119389] [<ffffffff811d540e>]
blkdev_get+0x5e/0x1e0
Jul 30 12:12:01 srv1 kernel: [101661.119393] [<ffffffff81337a82>]
register_disk+0x172/0x190
Jul 30 12:12:01 srv1 kernel: [101661.119396] [<ffffffff81338334>]
add_disk+0xb4/0x230
Jul 30 12:12:01 srv1 kernel: [101661.119403] [<ffffffff814bba76>]
sd_probe_async+0x126/0x220
Jul 30 12:12:01 srv1 kernel: [101661.119407] [<ffffffff8108704f>]
async_run_entry_fn+0xaf/0x1d0
Jul 30 12:12:01 srv1 kernel: [101661.119410] [<ffffffff81078b81>]
process_one_work+0x141/0x490
Jul 30 12:12:01 srv1 kernel: [101661.119413] [<ffffffff81079b48>]
worker_thread+0x168/0x400
Jul 30 12:12:01 srv1 kernel: [101661.119416] [<ffffffff810799e0>] ?
manage_workers+0x120/0x120
Jul 30 12:12:01 srv1 kernel: [101661.119419] [<ffffffff8107f050>]
kthread+0xc0/0xd0
Jul 30 12:12:01 srv1 kernel: [101661.119423] [<ffffffff8107ef90>] ?
flush_kthread_worker+0xb0/0xb0
Jul 30 12:12:01 srv1 kernel: [101661.119429] [<ffffffff816f61ec>]
ret_from_fork+0x7c/0xb0
Jul 30 12:12:01 srv1 kernel: [101661.119432] [<ffffffff8107ef90>] ?
flush_kthread_worker+0xb0/0xb0
We see this issue is fixed in 3.9 kernels with the following commit
https://github.com/torvalds/linux/commit/ac2e5327a5e4f6477afc6a3b3b0dc6e0476d71d4
Kindly request you to pull this patch into Ubuntu raring stable 3.8 kernel
version as detailed in
http://lwn.net/Articles/550581/
Thank You
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