From: Ira Weiny
kmap() and kmap_atomic() are being deprecated in favor of
kmap_local_page().
There are two main problems with kmap(): (1) It comes with an overhead
as mapping space is restricted and protected by a global lock for
synchronization and (2) it also requires global TLB invalidation
On Mon, Nov 08, 2021 at 09:02:29PM +, Jane Chu wrote:
> On 11/6/2021 9:48 AM, Dan Williams wrote:
> > On Fri, Nov 5, 2021 at 6:17 PM Jane Chu wrote:
> >>
> >> Introduce DAX_OP_NORMAL and DAX_OP_RECOVERY operation modes to
> >> {dax_direct_access, dax_copy_from_iter, dax_copy_to_iter}.
> >>
On Mon, Oct 18, 2021 at 06:40:46AM +0200, Christoph Hellwig wrote:
> Replace the dax_host_hash with an xarray indexed by the pointer value
> of the gendisk, and require explicitl calls from the block drivers that
> want to associate their gendisk with a dax_device.
>
> Signed-off-by: Christoph
On Fri, Jun 18, 2021 at 11:37:28AM +0800, Herbert Xu wrote:
> On Thu, Jun 17, 2021 at 08:01:57PM -0700, Ira Weiny wrote:
> >
> > > + flush_kernel_dcache_page(__page); \
> >
> > Is this required on 32bit systems? Why is kunmap_flush_on_unmap
On Tue, Jun 15, 2021 at 03:24:39PM +0200, Christoph Hellwig wrote:
> Add a helper that calls flush_kernel_dcache_page before unmapping the
> local mapping. flush_kernel_dcache_page is required for all pages
> potentially mapped into userspace that were written to using kmap*,
> so having a helper
On Fri, Jun 11, 2021 at 08:53:38AM +0200, Christoph Hellwig wrote:
> On Tue, Jun 08, 2021 at 06:48:22PM -0700, Ira Weiny wrote:
> > I'm still not 100% sure that these flushes are needed but the are not
> > no-ops on
> > every arch. Would it be best to preserve them aft
ted in a follow
> on series.
Other than the missing flush_dcache's.
For the series.
Reviewed-by: Ira Weiny
>
> Diffstat:
> arch/mips/include/asm/mach-rc32434/rb.h |2 -
> block/bio-integrity.c | 14 --
> block/bio.c
On Tue, Jun 08, 2021 at 06:06:01PM +0200, Christoph Hellwig wrote:
> Rewrite the actual bounce buffering loop in __blk_queue_bounce to that
> the memcpy_to_bvec helper can be used to perform the data copies.
>
> Signed-off-by: Christoph Hellwig
> ---
> block/bounce.c | 21 +++--
On Tue, Jun 08, 2021 at 06:05:56PM +0200, Christoph Hellwig wrote:
>
> rq_for_each_segment(bvec, req, iter) {
> - unsigned long flags;
> - dev_dbg(>sbd.core, "%s:%u: bio %u: %u sectors from %llu\n",
> - __func__, __LINE__, i,
> - bool ret;
>
> map = dm_get_live_table(md, _idx);
> if (!map)
> - return false;
> + goto out;
>
> ret = dm_table_supports_dax(map, device_supports_dax, );
>
> +out:
> dm_put_live_table(md, srcu_idx);
Wow that is an o
_dev || !bdev_dax_supported()) as the
_first_ check in __generic_fsdax_supported()?
It seems like the other pr_info's could also be called when DAX is not
supported and we probably don't want them to be?
Perhaps that should be a follow on patch though. So...
As a direct fix to c2affe920b0e
Rev
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