Hi,

> I have been using nilfs as my rootfs for several weeks now and have been
> experiencing random problems.  X programs will be become unresponsive and top
> will show that segctord is using ~50%hi (100% of one core).

Which version of kernel and distro are you using?

> I get thousands of traces in my syslog.  Below is a sample:
> 
> Aug 11 17:00:59 gentoo klogd: BUG: scheduling while atomic: segctord/1312/
> 0xffffffff
> Aug 11 17:00:59 gentoo klogd: Modules linked in:
> Aug 11 17:00:59 gentoo klogd: Pid: 1312, comm: segctord Not tainted
> 2.6.31-rc5-git7 #1
> Aug 11 17:00:59 gentoo klogd: Call Trace:
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff813c9821>] ? thread_return+0x4af/
> 0x6ee
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff8116245c>] ? __make_request+0x15c/
> 0x3e0
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff813c9e05>] ? schedule_timeout+0x1a5/
> 0x1e0
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff810b638b>] ? bvec_alloc_bs+0x5b/0x100
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff813c9071>] ? wait_for_common+0xc1/
> 0x180
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff8102b5c0>] ?
> default_wake_function+0x0/0x20
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff8113f190>] ? nilfs_segbuf_wait+0x30/
> 0x80
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff81142ef5>] ?
> nilfs_segctor_do_construct+0xf15/0x1ad0
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff81143dac>] ?
> nilfs_segctor_construct+0xbc/0xd0
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff8114413b>] ?
> nilfs_segctor_thread+0x15b/0x350
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff81140760>] ?
> nilfs_construction_timeout+0x0/0x10
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff810276d0>] ? __wake_up_common+0x50/
> 0x80
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff810481d0>] ?
> autoremove_wake_function+0x0/0x30
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff81143fe0>] ? nilfs_segctor_thread+0x0
> /0x350
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff81047e56>] ? kthread+0x96/0xa0
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff8100c38a>] ? child_rip+0xa/0x20
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff81047dc0>] ? kthread+0x0/0xa0
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff8100c380>] ? child_rip+0x0/0x20
> Aug 11 17:00:59 gentoo klogd: BUG: scheduling while atomic: segctord/1312/
> 0xffffffff
> Aug 11 17:00:59 gentoo klogd: Modules linked in:
> Aug 11 17:00:59 gentoo klogd: Pid: 1312, comm: segctord Not tainted
> 2.6.31-rc5-git7 #1
> Aug 11 17:00:59 gentoo klogd: Call Trace:
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff813c9821>] ? thread_return+0x4af/
> 0x6ee
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff8116f368>] ? __up_write+0x98/0x140
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff8114431c>] ?
> nilfs_segctor_thread+0x33c/0x350
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff81140760>] ?
> nilfs_construction_timeout+0x0/0x10
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff810276d0>] ? __wake_up_common+0x50/
> 0x80
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff810481d0>] ?
> autoremove_wake_function+0x0/0x30
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff81143fe0>] ? nilfs_segctor_thread+0x0
> /0x350
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff81047e56>] ? kthread+0x96/0xa0
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff8100c38a>] ? child_rip+0xa/0x20
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff81047dc0>] ? kthread+0x0/0xa0
> Aug 11 17:00:59 gentoo klogd:  [<ffffffff8100c380>] ? child_rip+0x0/0x20
> 
> 


-- 
Jiro SEKIBA <[email protected]>
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