| commit | 3f9e7c140e4c4e75bdeeb8df46dd40e49386c978 | [log] [tgz] |
|---|---|---|
| author | majianpeng <majianpeng@gmail.com> | Tue Jul 31 10:04:21 2012 +1000 |
| committer | NeilBrown <neilb@suse.de> | Tue Jul 31 10:04:21 2012 +1000 |
| tree | 81585524e1ce341eb518716c0702a6dfd64a19ef | |
| parent | 12cee5a8a29e7263e39953f1d941f723c617ca5f [diff] |
raid5: Add R5_ReadNoMerge flag which prevent bio from merging at block layer Because bios will merge at block-layer,so bios-error may caused by other bio which be merged into to the same request. Using this flag,it will find exactly error-sector and not do redundant operation like re-write and re-read. V0->V1:Using REQ_FLUSH instead REQ_NOMERGE avoid bio merging at block layer. Signed-off-by: Jianpeng Ma <majianpeng@gmail.com> Signed-off-by: NeilBrown <neilb@suse.de>