Messages in this thread | | | Date | Sun, 23 Nov 2008 17:17:50 +0100 | From | "Fabio Comolli" <> | Subject | Regression in 2.6.28-rc and 2.6.27-stable - hibernate related |
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Hi. As the subject says, I have a strange regression in latest git. Sometimes resume from hibernating hangs _after_ the resume stage. When the problem happens I usually have to powercycle my laptop.
The system managed to recover from the hang only twice and this time I found in the logs:
Nov 23 16:43:14 hawking kernel: sd 0:0:0:0: [sda] Starting disk Nov 23 16:43:14 hawking kernel: Restarting tasks ... done. Nov 23 16:43:52 hawking kernel: ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen Nov 23 16:43:52 hawking kernel: ata1.01: cmd a0/00:00:00:00:00/00:00:00:00:00/b0 tag 0 Nov 23 16:43:52 hawking kernel: cdb 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Nov 23 16:43:52 hawking kernel: res 40/00:03:00:00:00/00:00:00:00:00/b0 Emask 0x4 (timeout) Nov 23 16:43:52 hawking kernel: ata1.01: status: { DRDY } Nov 23 16:43:52 hawking kernel: ata1: soft resetting link Nov 23 16:43:57 hawking kernel: ata1.01: qc timeout (cmd 0xa1) Nov 23 16:43:57 hawking kernel: ata1.01: failed to IDENTIFY (I/O error, err_mask=0x4) Nov 23 16:43:57 hawking kernel: ata1.01: revalidation failed (errno=-5) Nov 23 16:43:57 hawking kernel: ata1: soft resetting link Nov 23 16:44:08 hawking kernel: ata1.01: qc timeout (cmd 0xa1) Nov 23 16:44:08 hawking kernel: ata1.01: failed to IDENTIFY (I/O error, err_mask=0x4) Nov 23 16:44:08 hawking kernel: ata1.01: revalidation failed (errno=-5) Nov 23 16:44:08 hawking kernel: ata1: soft resetting link Nov 23 16:44:38 hawking kernel: ata1.00: configured for UDMA/100 Nov 23 16:44:38 hawking kernel: ata1.01: configured for MWDMA2 Nov 23 16:44:38 hawking kernel: ata1: EH complete Nov 23 16:44:39 hawking kernel: sd 0:0:0:0: [sda] 156301488 512-byte hardware sectors: (80.0 GB/74.5 GiB) Nov 23 16:44:39 hawking kernel: sd 0:0:0:0: [sda] Write Protect is off Nov 23 16:44:39 hawking kernel: sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 Nov 23 16:44:39 hawking kernel: sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA Nov 23 16:44:39 hawking kernel: sd 0:0:0:0: [sda] 156301488 512-byte hardware sectors: (80.0 GB/74.5 GiB) Nov 23 16:44:39 hawking kernel: sd 0:0:0:0: [sda] Write Protect is off Nov 23 16:44:39 hawking kernel: sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 Nov 23 16:44:39 hawking kernel: sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
This problem:
* never happened in 2.6.27.4 * happened many times in 2.6.27.5 and .6 * never happened in 2.6.27.7 * happened the first time with the current -rc series just now (the logs are related to this one)
This is the first 2.6.28-rc kernel I tried.
I have to say that my kernel is tainted (fglrx and cisco_ipsec) but I also managed to replicate the hangs also with non-tainted ones.
I already tried some bisection between 2.6.27.4 and 2.6.27.5 but with no result, probably because I marked as "good" kernel that weren't good at all. Unfortunately this bug happens really at random times.
During the bisection I always used non-tainted kernels.
If anyone has ideas, I can provide some more data; I can also try another bisection series but I think it would take very long to get some good results (I mean, some days of testing between two different kernels just to reproduce the bug).
Regards, Fabio
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