On Wed, 23 Sep 2020, Jan Kara wrote:
> On Tue 22-09-20 12:46:05, Mikulas Patocka wrote:
> > > mapping 2^21 blocks requires a 5 level indirect tree. Which one if going
> > > to be faster to truncate away - a single record or 2 million individual
> > > blocks?
> > >
> > > IOWs, we can take
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On Wed, Sep 23, 2020 at 09:11:43AM -0400, Mikulas Patocka wrote:
> I also don't know how to implement journling on persistent memory :) On
> EXT4 or XFS you can pin dirty buffers in memory until the journal is
> flushed. This is obviously impossible on persistent memory. So, I'm
> considering
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On Tue, Sep 22, 2020 at 10:00:01PM -0700, Darrick J. Wong wrote:
> 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
Changes since v8 [1]:
- Rebase on v5.9-rc6
- Fix a performance regression in the x86 copy_mc_to_user()
implementation that was duplicating copies in the "fragile" case.
- Refreshed the cover letter.
[1]:
In reaction to a proposal to introduce a memcpy_mcsafe_fast()
implementation Linus points out that memcpy_mcsafe() is poorly named
relative to communicating the scope of the interface. Specifically what
addresses are valid to pass as source, destination, and what faults /
exceptions are handled.
pr_tce
vfio vfio_spapr_eeh loop kvm_hv kvm ip_tables x_tables sd_mod bnx2x mdio ahci
libahci tg3 libphy libata firmware_class dm_mirror dm_reg
ion_hash dm_log dm_mod
[ 2401.431534] CPU: 0 PID: 80501 Comm: preadv203 Not tainted
5.9.0-rc6-next-20200923+ #4
[ 2401.431567] NIP: c0473b30 LR: c000
The original copy_mc_fragile() implementation had negative performance
implications since it did not use the fast-string instruction sequence
to perform copies. For this reason copy_mc_to_kernel() fell back to
plain memcpy() to preserve performance on platform that did not indicate
the capability
On Wed, 23 Sep 2020, Dave Chinner wrote:
> > > dir-test /mnt/test/linux-2.6 63000 1048576
> > > nvfs 6.6s
> > > ext4 dax 8.4s
> > > xfs dax 12.2s
> > >
> > >
> > > dir-test /mnt/test/linux-2.6 63000 1048576 link
> > > nvfs 4.7s
> > > ext4 dax 5.6s
> > >
On Wed, Sep 23, 2020 at 1:04 AM David Hildenbrand wrote:
>
> On 08.09.20 17:33, Joao Martins wrote:
> > [Sorry for the late response]
> >
> > On 8/21/20 11:06 AM, David Hildenbrand wrote:
> >> On 03.08.20 07:03, Dan Williams wrote:
> >>> @@ -37,109 +45,94 @@ int dev_dax_kmem_probe(struct device
On Tue, Sep 22, 2020 at 06:05:26PM +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
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On 08.09.20 17:33, Joao Martins wrote:
> [Sorry for the late response]
>
> On 8/21/20 11:06 AM, David Hildenbrand wrote:
>> On 03.08.20 07:03, Dan Williams wrote:
>>> @@ -37,109 +45,94 @@ int dev_dax_kmem_probe(struct device *dev)
>>> * could be mixed in a node with faster memory, causing
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On Tue 22-09-20 12:46:05, Mikulas Patocka wrote:
> > mapping 2^21 blocks requires a 5 level indirect tree. Which one if going
> > to be faster to truncate away - a single record or 2 million individual
> > blocks?
> >
> > IOWs, we can take afford to take an extra cacheline miss or two on a
> >
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Invoice Due Date: 09/23/2020
Invoice Total Amount: $1,579.00
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