Re: [PATCH] fs/btrfs: Fix raid6 qstripe kmap'ing

2021-02-05 Thread David Sterba
On Thu, Feb 04, 2021 at 07:52:36PM -0800, Ira Weiny wrote: > On Thu, Feb 04, 2021 at 04:26:08PM +0100, David Sterba wrote: > > On Wed, Feb 03, 2021 at 04:56:48PM +0100, David Sterba wrote: > > > On Wed, Jan 27, 2021 at 10:15:03PM -0800, ira.we...@intel.com wrote: > > > > From: Ira Weiny > > > Chan

Re: [PATCH] fs/btrfs: Fix raid6 qstripe kmap'ing

2021-02-05 Thread Ira Weiny
On Fri, Feb 05, 2021 at 04:34:41PM +0100, David Sterba wrote: > On Thu, Feb 04, 2021 at 07:52:36PM -0800, Ira Weiny wrote: > > On Thu, Feb 04, 2021 at 04:26:08PM +0100, David Sterba wrote: > > > On Wed, Feb 03, 2021 at 04:56:48PM +0100, David Sterba wrote: > > > > On Wed, Jan 27, 2021 at 10:15:03PM

Re: [PATCH] fs/btrfs: Fix raid6 qstripe kmap'ing

2021-02-04 Thread Ira Weiny
On Thu, Feb 04, 2021 at 04:26:08PM +0100, David Sterba wrote: > On Wed, Feb 03, 2021 at 04:56:48PM +0100, David Sterba wrote: > > On Wed, Jan 27, 2021 at 10:15:03PM -0800, ira.we...@intel.com wrote: > > > From: Ira Weiny > > > > > > When a qstripe is required an extra page is allocated and mapped

Re: [PATCH] fs/btrfs: Fix raid6 qstripe kmap'ing

2021-02-04 Thread David Sterba
On Wed, Feb 03, 2021 at 04:56:48PM +0100, David Sterba wrote: > On Wed, Jan 27, 2021 at 10:15:03PM -0800, ira.we...@intel.com wrote: > > From: Ira Weiny > > > > When a qstripe is required an extra page is allocated and mapped. There > > were 3 problems. > > > > 1) There is no reason to map the

Re: [PATCH] fs/btrfs: Fix raid6 qstripe kmap'ing

2021-02-03 Thread David Sterba
On Wed, Jan 27, 2021 at 10:15:03PM -0800, ira.we...@intel.com wrote: > From: Ira Weiny > > When a qstripe is required an extra page is allocated and mapped. There > were 3 problems. > > 1) There is no reason to map the qstripe page more than 1 time if the >number of bits set in rbio->dbitma