On Fri, Oct 20, 2017 at 10:27:22AM -0700, Dan Williams wrote:
> I'll take a look at hooking this up through a page-idle callback. Can
> I get some breadcrumbs to grep for from XFS folks on how to set/clear
> the busy state of extents?
As Brian pointed out it's the xfs_extent_busy.c file (and I poi
On Fri, Oct 20, 2017 at 10:27:22AM -0700, Dan Williams wrote:
> On Fri, Oct 20, 2017 at 9:32 AM, Christoph Hellwig wrote:
> > On Fri, Oct 20, 2017 at 08:42:00AM -0700, Dan Williams wrote:
> >> I agree, but it needs quite a bit more thought and restructuring of
> >> the truncate path. I also wonder
On Fri, Oct 20, 2017 at 9:32 AM, Christoph Hellwig wrote:
> On Fri, Oct 20, 2017 at 08:42:00AM -0700, Dan Williams wrote:
>> I agree, but it needs quite a bit more thought and restructuring of
>> the truncate path. I also wonder how we reclaim those stranded
>> filesystem blocks, but a first appro
On Fri, Oct 20, 2017 at 08:42:00AM -0700, Dan Williams wrote:
> I agree, but it needs quite a bit more thought and restructuring of
> the truncate path. I also wonder how we reclaim those stranded
> filesystem blocks, but a first approximation is wait for the
> administrator to delete them or auto-
On Fri, Oct 20, 2017 at 6:05 AM, Jeff Layton wrote:
> On Thu, 2017-10-19 at 19:40 -0700, Dan Williams wrote:
>> get_user_pages() pins file backed memory pages for access by dma
>> devices. However, it only pins the memory pages not the page-to-file
>> offset association. If a file is truncated the
On Thu, 2017-10-19 at 19:40 -0700, Dan Williams wrote:
> get_user_pages() pins file backed memory pages for access by dma
> devices. However, it only pins the memory pages not the page-to-file
> offset association. If a file is truncated the pages are mapped out of
> the file and dma may continue i
get_user_pages() pins file backed memory pages for access by dma
devices. However, it only pins the memory pages not the page-to-file
offset association. If a file is truncated the pages are mapped out of
the file and dma may continue indefinitely into a page that is owned by
a device driver. This
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