Re: Ideas to reuse filesystem's checksum to enhance dm-raid1/10/5/6?

On 16.11.2017 09:38, Qu Wenruo wrote: > > > On 2017年11月16日 14:54, Nikolay Borisov wrote: >> >> >> On 16.11.2017 04:18, Qu Wenruo wrote: >>> Hi all, >>> >>> [Background] >>> Recently I'm considering the possibility to

Re: Ideas to reuse filesystem's checksum to enhance dm-raid1/10/5/6?

On 16.11.2017 04:18, Qu Wenruo wrote: > Hi all, > > [Background] > Recently I'm considering the possibility to use checksum from filesystem > to enhance device-mapper raid. > > The idea behind it is quite simple, since most modern filesystems have > checksum for their metadata, and even some

Re: [PATCH] bcache: lock in btree_flush_write() to avoid races

On 24.01.2018 08:54, tang.jun...@zte.com.cn wrote: > From: Tang Junhui > > In btree_flush_write(), two places need to take a locker to > avoid races: > > Firstly, we need take rcu read locker to protect the bucket_hash > traverse, since hlist_for_each_entry_rcu() must

Re: [PATCH 1/2] direct-io: Remove unused DIO_ASYNC_EXTEND flag

On 23.02.2018 13:45, Nikolay Borisov wrote: > This flag was added by 6039257378e4 ("direct-io: add flag to allow aio > writes beyond i_size") to support XFS. However, with the rework of > XFS' DIO's path to use iomap in acdda3aae146 ("xfs: use iomap_dio_rw") &g

Re: GPF in wb_congested due to null bdi_writeback

On 27.02.2018 18:05, Nikolay Borisov wrote: > Hello Tejun, > > So while running some fs tests I hit the following GPF. Btw the > warning taint flag was due to a debugging WARN_ON in btrfs 100 or so > tests ago so is unrelated to this gpf: > > [ 4255.628110] general p

GPF in wb_congested due to null bdi_writeback

Hello Tejun, So while running some fs tests I hit the following GPF. Btw the warning taint flag was due to a debugging WARN_ON in btrfs 100 or so tests ago so is unrelated to this gpf: [ 4255.628110] general protection fault: [#1] SMP PTI [ 4255.628303] Modules linked in: [ 4255.628446]