Messages in this thread Patch in this message | | | Date | Mon, 28 Jan 2008 14:01:56 -0500 | From | Mark Lord <> | Subject | Re: Problem with ata layer in 2.6.24 |
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Gene Heskett wrote: > Greeting; > > I had to reboot early this morning due to a freezeup, and I had a bunch of these in the messages log: > ============== > Jan 27 19:42:11 coyote kernel: [42461.915961] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen > Jan 27 19:42:11 coyote kernel: [42461.915973] ata1.00: cmd ca/00:08:b1:66:46/00:00:00:00:00/e8 tag 0 dma 4096 out > Jan 27 19:42:11 coyote kernel: [42461.915974] res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout) > Jan 27 19:42:11 coyote kernel: [42461.915978] ata1.00: status: { DRDY } > Jan 27 19:42:11 coyote kernel: [42461.916005] ata1: soft resetting link > Jan 27 19:42:12 coyote kernel: [42462.078216] ata1.00: configured for UDMA/100 > Jan 27 19:42:12 coyote kernel: [42462.078232] ata1: EH complete > Jan 27 19:42:12 coyote kernel: [42462.090700] sd 0:0:0:0: [sda] 390721968 512-byte hardware sectors (200050 MB) > Jan 27 19:42:12 coyote kernel: [42462.114230] sd 0:0:0:0: [sda] Write Protect is off > Jan 27 19:42:12 coyote kernel: [42462.115079] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA > =============== > That one showed up about 2 hours ago, so I expect I'll be locked up again before I've managed a 24 hour uptime. This drive passed > a 'smartctl -t long /dev/sda' with flying colors after the reboot > this morning. > > Two instances were logged after I had rebooted to 2.6.24 from 2.6.24-rc8: > > Jan 24 20:46:33 coyote kernel: [ 0.000000] Linux version 2.6.24 (root@coyote.coyote.den) (gcc version 4.1.2 20070925 (Red Hat 4.1.2-33)) #1 SMP Thu Jan 24 20:17:55 EST 2008 > ---- > Jan 27 02:28:29 coyote kernel: [193207.445158] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen > Jan 27 02:28:29 coyote kernel: [193207.445170] ata1.00: cmd 35/00:08:f9:24:0a/00:00:17:00:00/e0 tag 0 dma 4096 out > Jan 27 02:28:29 coyote kernel: [193207.445172] res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout) > Jan 27 02:28:29 coyote kernel: [193207.445175] ata1.00: status: { DRDY } > Jan 27 02:28:29 coyote kernel: [193207.445202] ata1: soft resetting link > Jan 27 02:28:29 coyote kernel: [193207.607384] ata1.00: configured for UDMA/100 > Jan 27 02:28:29 coyote kernel: [193207.607399] ata1: EH complete > Jan 27 02:28:29 coyote kernel: [193207.609681] sd 0:0:0:0: [sda] 390721968 512-byte hardware sectors (200050 MB) > Jan 27 02:28:29 coyote kernel: [193207.619277] sd 0:0:0:0: [sda] Write Protect is off > Jan 27 02:28:29 coyote kernel: [193207.649041] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA > Jan 27 02:30:06 coyote kernel: [193304.336929] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen > Jan 27 02:30:06 coyote kernel: [193304.336940] ata1.00: cmd ca/00:20:69:22:a6/00:00:00:00:00/e7 tag 0 dma 16384 out > Jan 27 02:30:06 coyote kernel: [193304.336942] res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout) > Jan 27 02:30:06 coyote kernel: [193304.336945] ata1.00: status: { DRDY } > Jan 27 02:30:06 coyote kernel: [193304.336972] ata1: soft resetting link > Jan 27 02:30:06 coyote kernel: [193304.499210] ata1.00: configured for UDMA/100 > Jan 27 02:30:06 coyote kernel: [193304.499226] ata1: EH complete > Jan 27 02:30:06 coyote kernel: [193304.499714] sd 0:0:0:0: [sda] 390721968 512-byte hardware sectors (200050 MB) > Jan 27 02:30:06 coyote kernel: [193304.499857] sd 0:0:0:0: [sda] Write Protect is off > Jan 27 02:30:06 coyote kernel: [193304.502315] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA > > None were logged during the time I was running an -rc7 or -rc8. > > The previous hits on this resulted in the udma speed being downgraded till it was actually running in pio just before the freeze that required the hardware reset button. > > I'll reboot to -rc8 right now and resume. If its the drive, I should see it. > If not, then 2.6.24 is where I'll point the finger. ..
The only libata change I can see that could possibly affect your setup, is this one here, which went in sometime between -rc7 and -final:
--- linux-2.6.24-rc7/drivers/ata/libata-eh.c 2008-01-06 16:45:38.000000000 -0500 +++ linux-2.6.24/drivers/ata/libata-eh.c 2008-01-24 17:58:37.000000000 -0500 @@ -1733,11 +1733,15 @@ ehc->i.action &= ~ATA_EH_PERDEV_MASK; }
- /* consider speeding down */ + /* propagate timeout to host link */ + if ((all_err_mask & AC_ERR_TIMEOUT) && !ata_is_host_link(link)) + ap->link.eh_context.i.err_mask |= AC_ERR_TIMEOUT; +
It looks pretty innocent to me, though. If you want to try reverting just that change (comment out the two lines and rebuild), then that might provide useful information here.
If -final is still b0rked even with those two lines changed back, then I suspect you're just "getting lucky" when switching between the -rc7/-rc8 kernel and the -final kernel.
"Lucky" in a bad way, that is.
The real test would be to rebuild the kernel without libata, and *with* the old IDE driver instead, and see if the problems persist.
If you need help with that, then perhaps someone familiar with Fedora might be able to assist.
Cheers
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