New: bad_page crash when writing to OCZ Agility2 120G
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Andrew Morton
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Quoted 32 lines · On Wed, 29 Sep 2010 19:03:55 GMT [email protected] wrote:
https://bugzilla.kernel.org/show_bug.cgi?id=19312
Summary: bad_page crash when writing to OCZ Agility2 120G Product: Drivers Version: 2.5 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Other AssignedTo: [email protected] ReportedBy: [email protected] Regression: NoCreated an attachment (id=31932)
--> (https://bugzilla.kernel.org/attachment.cgi?id=31932)
dmesg output after the OopsI recently installed OCZ Agility2 120G SSD. When i tried to make a FS on it, i got a crash. After further investigation i found that the crash appears only when PAE is enabled. I tried to boot into minimal shell (init=/bin/bash) and was able to reproduce the crash. This is how i reproduce the bug:
dd if=/dev/zero of=/dev/sda bs=256M
after some gigs of data (up to some tens of gigs) are written, i get an Oops as in the attached dmesg log. After some time from the oops, the system locks up (no NumLock as well as no Alt+SysRq stuff seems to work).
Quoted 10 lines
I tried to plug the SSD to another SATA port, swap it with HDDs, but the bug still persists. I tried to replace my nvidia card with s3virge to no avail. I also tried using mem=1024M kernel cmdline to see if it's because of higher memory PCI access, but the bug persists, though it appeared later than before. Also, the bug sometimes doesn't appear on first write pass, but does on second/third.
Ah, yes, the bug still happened after upgrade to 2.6.35.5 kernel. There's no such problem with any of the HDDs. I suspect this may be related to high speed of SSD which might create some race condition, but i'm not sure.
A repeatable crash in __block_write_full_page() in 2.6.34 and 2.6.35.
Does anyone have time to take a look? scripts/decodecode says
All code
========
0: 89 5c 24 28 mov %ebx,0x28(%rsp) 4: eb 1f jmp 0x25 6: 77 06 ja 0xe 8: 3b 74 24 20 cmp 0x20(%rsp),%esi c: 76 1d jbe 0x2b e: f0 80 23 fd lock andb $0xfd,(%rbx) 12: f0 80 0b 01 lock orb $0x1,(%rbx) 16: 8b 5b 04 mov 0x4(%rbx),%ebx 19: 39 5c 24 28 cmp %ebx,0x28(%rsp) 1d: 74 70 je 0x8f 1f: 83 c6 01 add $0x1,%esi 22: 83 d7 00 adc $0x0,%edi 25: 3b 7c 24 24 cmp 0x24(%rsp),%edi 29: 73 db jae 0x6 2b:* 8b 03 mov (%rbx),%eax <-- trapping instruction 2d: a8 20 test $0x20,%al 2f: 74 05 je 0x36 31: f6 c4 02 test $0x2,%ah 34: 74 e0 je 0x16 36: a8 02 test $0x2,%al 38: 90 nop 39: 74 db je 0x16 3b: 8b 44 24 2c mov 0x2c(%rsp),%eax 3f: 3b .byte 0x3b
Code starting with the faulting instruction
===========================================
0: 8b 03 mov (%rbx),%eax 2: a8 20 test $0x20,%al 4: 74 05 je 0xb 6: f6 c4 02 test $0x2,%ah 9: 74 e0 je 0xffffffffffffffeb b: a8 02 test $0x2,%al d: 90 nop e: 74 db je 0xffffffffffffffeb 10: 8b 44 24 2c mov 0x2c(%rsp),%eax 14: 3b .byte 0x3b
but my attention span ran out. I _think_ the bh ring got corrupted.
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