On Tue, Sep 22, 2020 at 12:23:45PM -0400, Qian Cai wrote:
> On Fri, 2020-09-11 at 00:47 +0100, Matthew Wilcox (Oracle) wrote:
> > Size the uptodate array dynamically to support larger pages in the
> > page cache. With a 64kB page, we're only saving 8 bytes per page today,
> > but with a 2MB
On Tue, Sep 22, 2020 at 12:46:05PM -0400, Mikulas Patocka wrote:
> I agree that the b+tree were a good choice for XFS.
>
> In RAM-based maps, red-black trees or avl trees are used often. In
> disk-based maps, btrees or b+trees are used. That's because in RAM, you
> are optimizing for the number
On Tue, 2020-09-22 at 18:05 +0100, Matthew Wilcox wrote:
> On Tue, Sep 22, 2020 at 12:23:45PM -0400, Qian Cai wrote:
> > On Fri, 2020-09-11 at 00:47 +0100, Matthew Wilcox (Oracle) wrote:
> > > Size the uptodate array dynamically to support larger pages in the
> > > page cache. With a 64kB page,
On Tue, 22 Sep 2020, Matthew Wilcox wrote:
> On Mon, Sep 21, 2020 at 12:20:42PM -0400, Mikulas Patocka wrote:
> > The same for directories - NVFS hashes the file name and uses radix-tree
> > to locate a directory page where the directory entry is located. XFS
> > b+trees would result in much
Clang warns:
kernel/resource.c:1281:53: warning: operator '?:' has lower precedence
than '|'; '|' will be evaluated first
[-Wbitwise-conditional-parentheses]
new_res = alloc_resource(GFP_KERNEL | alloc_nofail ? __GFP_NOFAIL : 0);
~
On 9/15/20 6:30 PM, Matthew Wilcox wrote:
On Tue, Sep 15, 2020 at 08:34:41AM -0400, Mikulas Patocka wrote:
- when the fsck.nvfs tool mmaps the device /dev/pmem0, the kernel uses
buffer cache for the mapping. The buffer cache slows does fsck by a factor
of 5 to 10. Could it be possible to
On 22.09.20 08:07, Nathan Chancellor wrote:
> Clang warns:
>
> kernel/resource.c:1281:53: warning: operator '?:' has lower precedence
> than '|'; '|' will be evaluated first
> [-Wbitwise-conditional-parentheses]
> new_res = alloc_resource(GFP_KERNEL | alloc_nofail ? __GFP_NOFAIL :
> 0);
On Mon, Sep 21, 2020 at 12:20:42PM -0400, Mikulas Patocka wrote:
> The same for directories - NVFS hashes the file name and uses radix-tree
> to locate a directory page where the directory entry is located. XFS
> b+trees would result in much more accesses than the radix-tree.
What? Radix trees
On Mon, Sep 21, 2020 at 12:19:07PM -0400, Mikulas Patocka wrote:
>
>
> On Tue, 15 Sep 2020, Dan Williams wrote:
>
> > > TODO:
> > >
> > > - programs run approximately 4% slower when running from Optane-based
> > > persistent memory. Therefore, programs and libraries should use page cache
> > >
on_hash dm_log dm_mod
[ 8805.895521][T445431] CPU: 61 PID: 445431 Comm: trinity-c61 Not tainted
5.9.0-rc6-next-20200922 #3
[ 8805.895551][T445431] NIP: c04734a0 LR: c047335c CTR:
[ 8805.895571][T445431] REGS: c01fe5427620 TRAP: 0700 Not tainted
(5.9.0-rc6-next-20
Hi
Thanks for reviewing NVFS.
On Tue, 22 Sep 2020, Dave Chinner wrote:
> Hi Mikulas,
>
> I'll say up front that I think you're barking up the wrong tree
> trying to knock down XFS and ext4 to justify NVFS. NVFS will stand
> or fall on it's own merits, not on how you think it's better than
>
On Tue, Sep 8, 2020 at 3:46 AM David Hildenbrand wrote:
>
> On 22.08.20 01:21, Andrew Morton wrote:
> > On Wed, 19 Aug 2020 18:53:57 -0700 Dan Williams
> > wrote:
> >
> >>> I think I am missing some important pieces. Bear with me.
> >>
> >> No worries, also bear with me, I'm going to be offline
On Tue, 2020-09-22 at 18:05 +0100, Matthew Wilcox wrote:
> On Tue, Sep 22, 2020 at 12:23:45PM -0400, Qian Cai wrote:
> > On Fri, 2020-09-11 at 00:47 +0100, Matthew Wilcox (Oracle) wrote:
> > > Size the uptodate array dynamically to support larger pages in the
> > > page cache. With a 64kB page,
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On Tue, Sep 22, 2020 at 12:46:05PM -0400, Mikulas Patocka wrote:
> Thanks for reviewing NVFS.
Not a review - I've just had a cursory look and not looked any
deeper after I'd noticed various red flags...
> On Tue, 22 Sep 2020, Dave Chinner wrote:
> > IOWs, extent based trees were chosen because
On Thu, Aug 6, 2020 at 8:35 AM Ingo Molnar wrote:
>
>
> * Dan Williams wrote:
>
> > On Thu, Aug 6, 2020 at 6:35 AM Ingo Molnar wrote:
> > >
> > >
> > > * kernel test robot wrote:
> > >
> > > > Greeting,
> > > >
> > > > FYI, we noticed a -43.3% regression of fio.read_iops due to commit:
> > > >
On Tue, Sep 22, 2020 at 09:06:03PM -0400, Qian Cai wrote:
> On Tue, 2020-09-22 at 18:05 +0100, Matthew Wilcox wrote:
> > On Tue, Sep 22, 2020 at 12:23:45PM -0400, Qian Cai wrote:
> > > On Fri, 2020-09-11 at 00:47 +0100, Matthew Wilcox (Oracle) wrote:
> > > > Size the uptodate array dynamically to
On Wed, Sep 23, 2020 at 03:48:59AM +0100, Matthew Wilcox wrote:
> On Tue, Sep 22, 2020 at 09:06:03PM -0400, Qian Cai wrote:
> > On Tue, 2020-09-22 at 18:05 +0100, Matthew Wilcox wrote:
> > > On Tue, Sep 22, 2020 at 12:23:45PM -0400, Qian Cai wrote:
> > > > On Fri, 2020-09-11 at 00:47 +0100,
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