On Tue, Jul 05, 2022 at 08:00:42PM -0700, Andrew Morton wrote:
> On Wed, 6 Jul 2022 10:47:32 +0800 Muchun Song
> wrote:
>
> > > If this wakeup is not one of these, then are there reports from the
> > > softlockup detector?
> > >
> > > Do we have reports of processes permanently stuck in D state
On Wed, 6 Jul 2022 10:47:32 +0800 Muchun Song wrote:
> > If this wakeup is not one of these, then are there reports from the
> > softlockup detector?
> >
> > Do we have reports of processes permanently stuck in D state?
> >
>
> No. The task is in an TASK_INTERRUPTIBLE state (see
> __fuse_dax_b
On Tue, Jul 05, 2022 at 04:47:10PM -0700, Andrew Morton wrote:
> On Wed, 6 Jul 2022 00:38:41 +0100 Matthew Wilcox wrote:
>
> > On Tue, Jul 05, 2022 at 02:18:19PM -0700, Andrew Morton wrote:
> > > On Tue, 5 Jul 2022 20:35:32 +0800 Muchun Song
> > > wrote:
> > >
> > > > FSDAX page refcounts are
On Wed, 6 Jul 2022 00:38:41 +0100 Matthew Wilcox wrote:
> On Tue, Jul 05, 2022 at 02:18:19PM -0700, Andrew Morton wrote:
> > On Tue, 5 Jul 2022 20:35:32 +0800 Muchun Song
> > wrote:
> >
> > > FSDAX page refcounts are 1-based, rather than 0-based: if refcount is
> > > 1, then the page is freed
On Tue, Jul 05, 2022 at 02:18:19PM -0700, Andrew Morton wrote:
> On Tue, 5 Jul 2022 20:35:32 +0800 Muchun Song
> wrote:
>
> > FSDAX page refcounts are 1-based, rather than 0-based: if refcount is
> > 1, then the page is freed. The FSDAX pages can be pinned through GUP,
> > then they will be un
On Tue, 5 Jul 2022 20:35:32 +0800 Muchun Song wrote:
> FSDAX page refcounts are 1-based, rather than 0-based: if refcount is
> 1, then the page is freed. The FSDAX pages can be pinned through GUP,
> then they will be unpinned via unpin_user_page() using a folio variant
> to put the page, howeve
On Sun, Jul 03, 2022 at 09:08:38PM +0800, Shiyang Ruan wrote:
> This patch is inspired by Dan's "mm, dax, pmem: Introduce
> dev_pagemap_failure()"[1]. With the help of dax_holder and
> ->notify_failure() mechanism, the pmem driver is able to ask filesystem
> (or mapped device) on it to unmap all f
FSDAX page refcounts are 1-based, rather than 0-based: if refcount is
1, then the page is freed. The FSDAX pages can be pinned through GUP,
then they will be unpinned via unpin_user_page() using a folio variant
to put the page, however, folio variants did not consider this special
case, the result
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