forked from Minki/linux
b1f1b8ce0a
This will fix the following preempt count underflow reported from users with the title "[NILFS users] segctord problem" (Message-ID: <949415.6494.qm@web58808.mail.re1.yahoo.com> and Message-ID: <debc30fc0908270825v747c1734xa59126623cfd5b05@mail.gmail.com>): WARNING: at kernel/sched.c:4890 sub_preempt_count+0x95/0xa0() Hardware name: HP Compaq 6530b (KR980UT#ABC) Modules linked in: bridge stp llc bnep rfcomm l2cap xfs exportfs nilfs2 cowloop loop vboxnetadp vboxnetflt vboxdrv btusb bluetooth uvcvideo videodev v4l1_compat v4l2_compat_ioctl32 arc4 snd_hda_codec_analog ecb iwlagn iwlcore rfkill lib80211 mac80211 snd_hda_intel snd_hda_codec ehci_hcd uhci_hcd usbcore snd_hwdep snd_pcm tg3 cfg80211 psmouse snd_timer joydev libphy ohci1394 snd_page_alloc hp_accel lis3lv02d ieee1394 led_class i915 drm i2c_algo_bit video backlight output i2c_core dm_crypt dm_mod Pid: 4197, comm: segctord Not tainted 2.6.30-gentoo-r4-64 #7 Call Trace: [<ffffffff8023fa05>] ? sub_preempt_count+0x95/0xa0 [<ffffffff802470f8>] warn_slowpath_common+0x78/0xd0 [<ffffffff8024715f>] warn_slowpath_null+0xf/0x20 [<ffffffff8023fa05>] sub_preempt_count+0x95/0xa0 [<ffffffffa04ce4db>] nilfs_btnode_prepare_change_key+0x11b/0x190 [nilfs2] [<ffffffffa04d01ad>] nilfs_btree_assign_p+0x19d/0x1e0 [nilfs2] [<ffffffffa04d10ad>] nilfs_btree_assign+0xbd/0x130 [nilfs2] [<ffffffffa04cead7>] nilfs_bmap_assign+0x47/0x70 [nilfs2] [<ffffffffa04d9bc6>] nilfs_segctor_do_construct+0x956/0x20f0 [nilfs2] [<ffffffff805ac8e2>] ? _spin_unlock_irqrestore+0x12/0x40 [<ffffffff803c06e0>] ? __up_write+0xe0/0x150 [<ffffffff80262959>] ? up_write+0x9/0x10 [<ffffffffa04ce9f3>] ? nilfs_bmap_test_and_clear_dirty+0x43/0x60 [nilfs2] [<ffffffffa04cd627>] ? nilfs_mdt_fetch_dirty+0x27/0x60 [nilfs2] [<ffffffffa04db5fc>] nilfs_segctor_construct+0x8c/0xd0 [nilfs2] [<ffffffffa04dc3dc>] nilfs_segctor_thread+0x15c/0x3a0 [nilfs2] [<ffffffffa04dbe20>] ? nilfs_construction_timeout+0x0/0x10 [nilfs2] [<ffffffff80252633>] ? add_timer+0x13/0x20 [<ffffffff802370da>] ? __wake_up_common+0x5a/0x90 [<ffffffff8025e960>] ? autoremove_wake_function+0x0/0x40 [<ffffffffa04dc280>] ? nilfs_segctor_thread+0x0/0x3a0 [nilfs2] [<ffffffffa04dc280>] ? nilfs_segctor_thread+0x0/0x3a0 [nilfs2] [<ffffffff8025e556>] kthread+0x56/0x90 [<ffffffff8020cdea>] child_rip+0xa/0x20 [<ffffffff8025e500>] ? kthread+0x0/0x90 [<ffffffff8020cde0>] ? child_rip+0x0/0x20 This problem was caused due to a missing radix_tree_preload() call in the retry path of nilfs_btnode_prepare_change_key() function. Reported-by: Eric A <eric225125@yahoo.com> Reported-by: Jerome Poulin <jeromepoulin@gmail.com> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Tested-by: Jerome Poulin <jeromepoulin@gmail.com> Cc: stable@kernel.org |
||
|---|---|---|
| .. | ||
| alloc.c | ||
| alloc.h | ||
| bmap_union.h | ||
| bmap.c | ||
| bmap.h | ||
| btnode.c | ||
| btnode.h | ||
| btree.c | ||
| btree.h | ||
| cpfile.c | ||
| cpfile.h | ||
| dat.c | ||
| dat.h | ||
| dir.c | ||
| direct.c | ||
| direct.h | ||
| file.c | ||
| gcdat.c | ||
| gcinode.c | ||
| ifile.c | ||
| ifile.h | ||
| inode.c | ||
| ioctl.c | ||
| Kconfig | ||
| Makefile | ||
| mdt.c | ||
| mdt.h | ||
| namei.c | ||
| nilfs.h | ||
| page.c | ||
| page.h | ||
| recovery.c | ||
| sb.h | ||
| segbuf.c | ||
| segbuf.h | ||
| segment.c | ||
| segment.h | ||
| sufile.c | ||
| sufile.h | ||
| super.c | ||
| the_nilfs.c | ||
| the_nilfs.h | ||