[2.6.38.7] slow path warning in do_syslog().
From: PaweÅ Sikora
Date: Tue May 24 2011 - 15:25:11 EST
hi,
the vanilla 2.6.38.7 from git reports slow path warning right after startup.
[ 84.226128] ------------[ cut here ]------------
[ 84.226139] WARNING: at kernel/printk.c:288 do_syslog+0xc1/0x4c0()
[ 84.226141] Hardware name: H8DGU
[ 84.226143] Attempt to access syslog with CAP_SYS_ADMIN but no CAP_SYSLOG (deprecated).
[ 84.226145] Modules linked in: nfsd lockd nfs_acl auth_rpcgss sunrpc exportfs ipmi_si ipmi_devintf ipmi_msghandler sch_sfq iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 iptable_filter xt_TCPMSS xt_tcpudp iptable_mangle ip_tables ip6table_filter ip6_tables x_tables ext4 jbd2 crc16 raid0 dm_mod uvesafb autofs4 dummy aoe usbhid hid ide_cd_mod cdrom ata_generic pata_acpi pata_atiixp ide_pci_generic ohci_hcd atiixp ide_core ssb ehci_hcd igb mmc_core sp5100_tco usbcore pcmcia amd64_edac_mod i2c_piix4 k10temp pcmcia_core i2c_core hwmon evdev edac_core ghes edac_mce_amd pcspkr processor dca sg button hed sd_mod crc_t10dif raid1 md_mod ext3 jbd mbcache ahci libahci libata scsi_mod [last unloaded: scsi_wait_scan]
[ 84.226197] Pid: 3291, comm: syslog-ng Not tainted 2.6.38.7 #1
[ 84.226199] Call Trace:
[ 84.226207] [<ffffffff810487da>] ? warn_slowpath_common+0x7a/0xb0
[ 84.226211] [<ffffffff810488b1>] ? warn_slowpath_fmt+0x41/0x50
[ 84.226216] [<ffffffff811b9974>] ? security_capable+0x24/0x30
[ 84.226220] [<ffffffff81049a21>] ? do_syslog+0xc1/0x4c0
[ 84.226224] [<ffffffff8118c695>] ? proc_reg_open+0x45/0x170
[ 84.226227] [<ffffffff81196857>] ? kmsg_open+0x17/0x20
[ 84.226230] [<ffffffff8118c6e6>] ? proc_reg_open+0x96/0x170
[ 84.226233] [<ffffffff81196820>] ? kmsg_release+0x0/0x20
[ 84.226236] [<ffffffff8118c650>] ? proc_reg_open+0x0/0x170
[ 84.226241] [<ffffffff81134029>] ? __dentry_open+0xc9/0x2e0
[ 84.226245] [<ffffffff8113fcee>] ? generic_permission+0x1e/0xc0
[ 84.226249] [<ffffffff81135291>] ? nameidata_to_filp+0x71/0x80
[ 84.226253] [<ffffffff81143bd8>] ? finish_open+0xc8/0x1b0
[ 84.226257] [<ffffffff81143402>] ? do_path_lookup+0x82/0x160
[ 84.226260] [<ffffffff8114436d>] ? do_filp_open+0x2ad/0x7d0
[ 84.226264] [<ffffffff811203b6>] ? init_object+0x46/0x80
[ 84.226268] [<ffffffff81121e09>] ? __slab_alloc+0x3a9/0x410
[ 84.226271] [<ffffffff81141c36>] ? getname+0x36/0x220
[ 84.226275] [<ffffffff811503d7>] ? alloc_fd+0x47/0x140
[ 84.226279] [<ffffffff81135304>] ? do_sys_open+0x64/0x110
[ 84.226282] [<ffffffff811353cb>] ? sys_open+0x1b/0x20
[ 84.226287] [<ffffffff81002cbb>] ? system_call_fastpath+0x16/0x1b
[ 84.226289] ---[ end trace e86f16754c027c2b ]---
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