From: Jan Kara <jack@suse.cz>
To: Matthew Wilcox <willy@infradead.org>
Cc: Jan Kara <jack@suse.cz>, linux-nvdimm <linux-nvdimm@lists.01.org>,
Boaz Harrosh <openosd@gmail.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
stable <stable@vger.kernel.org>,
Robert Barror <robert.barror@intel.com>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
Seema Pandit <seema.pandit@intel.com>
Subject: Re: [PATCH] dax: Fix missed PMD wakeups
Date: Wed, 10 Jul 2019 22:26:47 +0200 [thread overview]
Message-ID: <20190710202647.GA7269@quack2.suse.cz> (raw)
In-Reply-To: <20190710201539.GN32320@bombadil.infradead.org>
On Wed 10-07-19 13:15:39, Matthew Wilcox wrote:
> On Wed, Jul 10, 2019 at 09:02:04PM +0200, Jan Kara wrote:
> > +#define DAX_ENTRY_CONFLICT dax_make_entry(pfn_to_pfn_t(1), DAX_EMPTY)
>
> I was hoping to get rid of DAX_EMPTY ... it's almost unused now. Once
> we switch to having a single DAX_LOCK value instead of a single bit,
> I think it can go away, freeing up two bits.
>
> If you really want a special DAX_ENTRY_CONFLICT, I think we can make
> one in the 2..4094 range.
>
> That aside, this looks pretty similar to the previous patch I sent, so
> if you're now happy with this, let's add
>
> #define XA_DAX_CONFLICT_ENTRY xa_mk_internal(258)
>
> to xarray.h and do it that way?
Yeah, that would work for me as well. The chosen value for DAX_ENTRY_CONFLICT
was pretty arbitrary. Or we could possibly use:
#define DAX_ENTRY_CONFLICT XA_ZERO_ENTRY
so that we don't leak DAX-specific internal definition into xarray.h?
Honza
--
Jan Kara <jack@suse.com>
SUSE Labs, CR
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WARNING: multiple messages have this Message-ID (diff)
From: Jan Kara <jack@suse.cz>
To: Matthew Wilcox <willy@infradead.org>
Cc: Jan Kara <jack@suse.cz>, Dan Williams <dan.j.williams@intel.com>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
Boaz Harrosh <openosd@gmail.com>, stable <stable@vger.kernel.org>,
Robert Barror <robert.barror@intel.com>,
Seema Pandit <seema.pandit@intel.com>,
linux-nvdimm <linux-nvdimm@lists.01.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] dax: Fix missed PMD wakeups
Date: Wed, 10 Jul 2019 22:26:47 +0200 [thread overview]
Message-ID: <20190710202647.GA7269@quack2.suse.cz> (raw)
In-Reply-To: <20190710201539.GN32320@bombadil.infradead.org>
On Wed 10-07-19 13:15:39, Matthew Wilcox wrote:
> On Wed, Jul 10, 2019 at 09:02:04PM +0200, Jan Kara wrote:
> > +#define DAX_ENTRY_CONFLICT dax_make_entry(pfn_to_pfn_t(1), DAX_EMPTY)
>
> I was hoping to get rid of DAX_EMPTY ... it's almost unused now. Once
> we switch to having a single DAX_LOCK value instead of a single bit,
> I think it can go away, freeing up two bits.
>
> If you really want a special DAX_ENTRY_CONFLICT, I think we can make
> one in the 2..4094 range.
>
> That aside, this looks pretty similar to the previous patch I sent, so
> if you're now happy with this, let's add
>
> #define XA_DAX_CONFLICT_ENTRY xa_mk_internal(258)
>
> to xarray.h and do it that way?
Yeah, that would work for me as well. The chosen value for DAX_ENTRY_CONFLICT
was pretty arbitrary. Or we could possibly use:
#define DAX_ENTRY_CONFLICT XA_ZERO_ENTRY
so that we don't leak DAX-specific internal definition into xarray.h?
Honza
--
Jan Kara <jack@suse.com>
SUSE Labs, CR
next prev parent reply other threads:[~2019-07-11 8:13 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-03 7:24 [PATCH] dax: Fix missed PMD wakeups Dan Williams
2019-07-03 7:24 ` Dan Williams
2019-07-03 12:17 ` Matthew Wilcox
2019-07-03 12:17 ` Matthew Wilcox
2019-07-03 17:01 ` Dan Williams
2019-07-03 17:01 ` Dan Williams
2019-07-03 19:53 ` Matthew Wilcox
2019-07-03 19:53 ` Matthew Wilcox
2019-07-03 21:28 ` Dan Williams
2019-07-03 21:28 ` Dan Williams
2019-07-04 3:27 ` Matthew Wilcox
2019-07-04 3:27 ` Matthew Wilcox
2019-07-04 13:00 ` Boaz Harrosh
2019-07-04 13:00 ` Boaz Harrosh
2019-07-04 13:58 ` Matthew Wilcox
2019-07-04 13:58 ` Matthew Wilcox
2019-07-04 14:32 ` Boaz Harrosh
2019-07-04 14:32 ` Boaz Harrosh
2019-07-04 16:54 ` Jan Kara
2019-07-04 16:54 ` Jan Kara
2019-07-04 19:14 ` Matthew Wilcox
2019-07-04 19:14 ` Matthew Wilcox
2019-07-04 23:27 ` Dan Williams
2019-07-04 23:27 ` Dan Williams
2019-07-05 19:10 ` Matthew Wilcox
2019-07-05 19:10 ` Matthew Wilcox
2019-07-05 20:47 ` Dan Williams
2019-07-05 20:47 ` Dan Williams
2019-07-10 19:02 ` Jan Kara
2019-07-10 19:02 ` Jan Kara
2019-07-10 20:15 ` Matthew Wilcox
2019-07-10 20:15 ` Matthew Wilcox
2019-07-10 20:26 ` Jan Kara [this message]
2019-07-10 20:26 ` Jan Kara
2019-07-11 14:13 ` Matthew Wilcox
2019-07-11 14:13 ` Matthew Wilcox
2019-07-11 15:25 ` Matthew Wilcox
2019-07-11 15:25 ` Matthew Wilcox
2019-07-11 15:41 ` Jan Kara
2019-07-11 15:41 ` Jan Kara
2019-07-17 3:39 ` Dan Williams
2019-07-17 3:39 ` Dan Williams
2019-07-29 12:02 ` Jan Kara
2019-07-29 12:02 ` Jan Kara
2019-07-29 15:18 ` Dan Williams
2019-07-29 15:18 ` Dan Williams
2019-07-11 3:08 ` Matthew Wilcox
2019-07-11 3:08 ` Matthew Wilcox
2019-07-11 7:48 ` Jan Kara
2019-07-11 7:48 ` Jan Kara
2019-07-11 13:28 ` Matthew Wilcox
2019-07-11 13:28 ` Matthew Wilcox
2019-07-11 3:35 ` Matthew Wilcox
2019-07-11 3:35 ` Matthew Wilcox
2019-07-11 8:06 ` Jan Kara
2019-07-11 8:06 ` Jan Kara
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