Bug 104081
Summary: | Certain operations on nfsroot cause /proc to be forcefully unmounted | ||
---|---|---|---|
Product: | File System | Reporter: | Lubos Dolezel (lubosd) |
Component: | NFS | Assignee: | Trond Myklebust (trondmy) |
Status: | NEW --- | ||
Severity: | normal | CC: | bfields, szg00000 |
Priority: | P1 | ||
Hardware: | IA-64 | ||
OS: | Linux | ||
Kernel Version: | 3.19.1 | Subsystem: | |
Regression: | No | Bisected commit-id: |
Description
Lubos Dolezel
2015-09-05 18:04:06 UTC
More information: the above does NOT happen when / is NFS mounted by dracut. It only happens when root=/dev/nfsroot is used. I take it back, random forced unmounts happen with / mounted via NFS by dracut as well. This time I noticed that apart from /proc, /dev was unmounted as well. [ 5391.608196] ------------[ cut here ]------------ [ 5391.608205] WARNING: CPU: 2 PID: 5740 at fs/namespace.c:1335 umount_tree+0x33/0x2e0() [ 5391.608207] umount_tree: proc [ 5391.608209] Modules linked in: cts rpcsec_gss_krb5 snd_usb_audio snd_usbmidi_lib nvidia(PO) x86_pkg_temp_thermal [ 5391.608217] CPU: 2 PID: 5740 Comm: krusader Tainted: P W O 3.19.1-gentoo #12 [ 5391.608219] Hardware name: System manufacturer System Product Name/P8Z77-V LX, BIOS 2204 08/14/2013 [ 5391.608221] ffffffff81be50d8 ffff8803accdba38 ffffffff81821fba ffffffff81e3fe58 [ 5391.608224] ffff8803accdba88 ffff8803accdba78 ffffffff8104c5b5 dead000000100100 [ 5391.608227] ffff8804098503c0 0000000000000002 000000000000000f ffff880408cb5c00 [ 5391.608230] Call Trace: [ 5391.608235] [<ffffffff81821fba>] dump_stack+0x45/0x57 [ 5391.608240] [<ffffffff8104c5b5>] warn_slowpath_common+0x85/0xc0 [ 5391.608243] [<ffffffff8104c631>] warn_slowpath_fmt+0x41/0x50 [ 5391.608248] [<ffffffff811653a5>] ? d_walk+0x65/0x2e0 [ 5391.608251] [<ffffffff81165720>] ? __d_drop+0xb0/0xb0 [ 5391.608255] [<ffffffff8116e9f3>] umount_tree+0x33/0x2e0 [ 5391.608258] [<ffffffff81828cd1>] ? down_write+0x11/0x40 [ 5391.608262] [<ffffffff8116f499>] __detach_mounts+0x59/0x90 [ 5391.608266] [<ffffffff81166415>] d_invalidate+0xc5/0xf0 [ 5391.608270] [<ffffffff811c0aa0>] nfs_readdir_page_filler+0x250/0x470 [ 5391.608275] [<ffffffff811c0e97>] nfs_readdir_xdr_to_array+0x1d7/0x2b0 [ 5391.608279] [<ffffffff811c0f70>] ? nfs_readdir_xdr_to_array+0x2b0/0x2b0 [ 5391.608283] [<ffffffff811c0f8d>] nfs_readdir_filler+0x1d/0x80 [ 5391.608286] [<ffffffff811029de>] do_read_cache_page+0x7e/0x1a0 [ 5391.608289] [<ffffffff81102b17>] read_cache_page+0x17/0x20 [ 5391.608293] [<ffffffff811c113e>] nfs_readdir+0x14e/0x540 [ 5391.608297] [<ffffffff811d9fd0>] ? nfs3_xdr_dec_fsstat3res+0xe0/0xe0 [ 5391.608301] [<ffffffff81162227>] iterate_dir+0x97/0x130 [ 5391.608305] [<ffffffff811626ac>] SyS_getdents+0x7c/0xf0 [ 5391.608308] [<ffffffff81162390>] ? fillonedir+0xd0/0xd0 [ 5391.608312] [<ffffffff8182a752>] system_call_fastpath+0x12/0x17 [ 5391.608314] ---[ end trace c9220b75ce5879c3 ]--- Apologies, doesn't ring a bell for me. Might be worth just trying a more recent kernel to see if something's been fixed since 3.19. |