Re: [dm-devel] [RFC] A SCSI fault injection framework using SystemTap.

2008-01-15 Thread Alasdair G Kergon
On Tue, Jan 15, 2008 at 12:04:09PM +0900, K.Tanaka wrote: > -dm-mirror's redundancy doesn't work. A read error from the disk consisting >the array will be directory passed to the userspace, without reading from >the other mirror. >(It turns out that this issue is a known issue, but

Re: [RFC] A SCSI fault injection framework using SystemTap.

2008-01-15 Thread K.Tanaka
Matthew Wilcox wrote: > On Tue, Jan 15, 2008 at 12:04:09PM +0900, K.Tanaka wrote: >> I would like to introduce a SCSI fault injection framework using SystemTap. >> >> Currently, kernel has Fault-injection framework and Faulty mode for md, >> which can also be used for testing the error handling.

Re: [RFC] A SCSI fault injection framework using SystemTap.

2008-01-15 Thread K.Tanaka
Matthew Wilcox wrote: On Tue, Jan 15, 2008 at 12:04:09PM +0900, K.Tanaka wrote: I would like to introduce a SCSI fault injection framework using SystemTap. Currently, kernel has Fault-injection framework and Faulty mode for md, which can also be used for testing the error handling. But, they

Re: [dm-devel] [RFC] A SCSI fault injection framework using SystemTap.

2008-01-15 Thread Alasdair G Kergon
On Tue, Jan 15, 2008 at 12:04:09PM +0900, K.Tanaka wrote: -dm-mirror's redundancy doesn't work. A read error from the disk consisting the array will be directory passed to the userspace, without reading from the other mirror. (It turns out that this issue is a known issue, but the

Re: [RFC] A SCSI fault injection framework using SystemTap.

2008-01-14 Thread Matthew Wilcox
On Tue, Jan 15, 2008 at 12:04:09PM +0900, K.Tanaka wrote: > I would like to introduce a SCSI fault injection framework using SystemTap. > > Currently, kernel has Fault-injection framework and Faulty mode for md, > which can also be used for testing the error handling. But, they could > only

[RFC] A SCSI fault injection framework using SystemTap.

2008-01-14 Thread K.Tanaka
I would like to introduce a SCSI fault injection framework using SystemTap. Currently, kernel has Fault-injection framework and Faulty mode for md, which can also be used for testing the error handling. But, they could only produce fixed type of errors stochastically. In order to simulate more

[RFC] A SCSI fault injection framework using SystemTap.

2008-01-14 Thread K.Tanaka
I would like to introduce a SCSI fault injection framework using SystemTap. Currently, kernel has Fault-injection framework and Faulty mode for md, which can also be used for testing the error handling. But, they could only produce fixed type of errors stochastically. In order to simulate more

Re: [RFC] A SCSI fault injection framework using SystemTap.

2008-01-14 Thread Matthew Wilcox
On Tue, Jan 15, 2008 at 12:04:09PM +0900, K.Tanaka wrote: I would like to introduce a SCSI fault injection framework using SystemTap. Currently, kernel has Fault-injection framework and Faulty mode for md, which can also be used for testing the error handling. But, they could only produce