On 08/30/2013 04:48 PM, Al Viro wrote:
On Fri, Aug 30, 2013 at 04:35:49PM -0400, Waiman Long wrote:
The AIM7 test was run on a set of 16 ramdisk formated with ext3
filesystem with the following mount options:
barrier=0,async,noatime,nodiratime. Maybe that is a factor.
I would be really surprised if it was... Could you slap the following
into __fput():
struct mount *m = real_mount(mnt);
if (unlikely(!m->mnt_ns)) {
printk(KERN_INFO "type = %s",
mnt->mnt_sb->s_type->name);
WARN_ON(1);
}
and see what it catches? That'll need #include "fs/mount.h" in
fs/file_table.c to compile...
I slapped in the code segment, and the following was logged:
[ 340.871590] type = tmpfs
[ 340.871596] ------------[ cut here ]------------
[ 340.871606] WARNING: CPU: 37 PID: 63276 at fs/file_table.c:239
__fput+0x23d/0x270()
[ 340.871607] Modules linked in: brd(F) ip6table_filter(F)
ip6_tables(F) iptable_filter(F) ip_tables(F) ebtable_nat(F) ebtables(F)
x_tables(F) edd(F) af_packet(F) bridge(F) stp(F) llc(F)
cpufreq_conservative(F) cpufreq_userspace(F) cpufreq_powersave(F)
pcc_cpufreq(F) microcode(F) fuse(F) loop(F) vhost_net(F) macvtap(F)
macvlan(F) vhost(F) tun(F) kvm_intel(F) ipv6(F) kvm(F) iTCO_wdt(F)
iTCO_vendor_support(F) joydev(F) igb(F) tpm_infineon(F) dca(F) ptp(F)
hid_generic(F) i7core_edac(F) sr_mod(F) tpm_tis(F) pps_core(F) qlcnic(F)
tpm(F) edac_core(F) be2net(F) netxen_nic(F) lpc_ich(F) ehci_pci(F)
mfd_core(F) hpwdt(F) hpilo(F) pcspkr(F) serio_raw(F) cdrom(F)
tpm_bios(F) sg(F) rtc_cmos(F) mperf(F) button(F) acpi_power_meter(F)
ext3(F) jbd(F) mbcache(F) dm_mirror(F) dm_region_hash(F) dm_log(F)
linear(F) radeon(F) ttm(F) drm_kms_helper(F) drm(F) i2c_algo_bit(F)
i2c_core(F) usbhid(F) hid(F) uhci_hcd(F) ehci_hcd(F) usbcore(F)
qla2xxx(F) sd_mod(F) usb_common(F) thermal(F) processor(F)
thermal_sys(F) hwmon(F) scsi_dh_emc(F) scsi_dh_rdac(F) scsi_dh_hp_sw(F)
scsi_dh_alua(F) scsi_dh(F) dm_snapshot(F) dm_mod(F) ata_generic(F)
ata_piix(F) libata(F) hpsa(F) lpfc(F) scsi_transport_fc(F) scsi_tgt(F)
crc_t10dif(F) cciss(F) scsi_mod(F)
[ 340.871663] CPU: 37 PID: 63276 Comm: reaim Tainted: GF W
3.11.0-rc7-lockref-0.11-default #4
[ 340.871665] Hardware name: HP ProLiant DL980 G7, BIOS P66 07/30/2012
[ 340.871667] 00000000000000ef ffff899f6b03dd88 ffffffff814992f5
ffff899f6b03ddc8
[ 340.871681] ffffffff8104a187 ffff899f6b03dda8 0000000000000000
ffff899f6b03aa40
[ 340.871686] ffff899f68fc7cc0 ffff899f69ee8ae0 ffff899f69ee8ae0
ffff899f6b03ddd8
[ 340.871692] Call Trace:
[ 340.871700] [<ffffffff814992f5>] dump_stack+0x6a/0x7d
[ 340.871705] [<ffffffff8104a187>] warn_slowpath_common+0x87/0xb0
[ 340.871709] [<ffffffff8104a1c5>] warn_slowpath_null+0x15/0x20
[ 340.871712] [<ffffffff8116c5bd>] __fput+0x23d/0x270
[ 340.871715] [<ffffffff8116c699>] ____fput+0x9/0x10
[ 340.871719] [<ffffffff81068ae1>] task_work_run+0xb1/0xe0
[ 340.871724] [<ffffffff81002990>] do_notify_resume+0x80/0x1b0
[ 340.871728] [<ffffffff811ed120>] ? ipc_lock+0x30/0x50
[ 340.871732] [<ffffffff8113a356>] ? remove_vma+0x56/0x60
[ 340.871736] [<ffffffff8113c1bf>] ? do_munmap+0x34f/0x380
[ 340.871741] [<ffffffff814a5fda>] int_signal+0x12/0x17
[ 340.871744] ---[ end trace aafa6c45f3388d65 ]---
Regards,
Longman
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