Re: [PATCH 0/5] block, migration: improve debugging of migration bdrv_flush failure

2021-04-15 Thread Connor Kuehl
On 4/15/21 8:58 AM, Daniel P. Berrangé wrote: I spent a while debugging a tricky migration failure today which was ultimately caused by fdatasync() getting EACCESS. The existing probes were not sufficient to diagnose this, so I had to resort to GDB. This improves probes and block error reporting

[PATCH 0/5] block, migration: improve debugging of migration bdrv_flush failure

2021-04-15 Thread Daniel P . Berrangé
I spent a while debugging a tricky migration failure today which was ultimately caused by fdatasync() getting EACCESS. The existing probes were not sufficient to diagnose this, so I had to resort to GDB. This improves probes and block error reporting to make future diagnosis possible without GDB.