On 9/19/2024 12:16 PM, Linus Torvalds wrote:
> On Thu, 19 Sept 2024 at 00:44, Neeraj Upadhyay
> wrote:
>>
>> While we were working on this problem, this refcount scalability issue got
>> resolved recently with conditional ref acquisition [3] (however, there are
>> new
>> developments in appa
On Thu, Sep 19, 2024 at 04:14:05AM +0530, Neeraj Upadhyay wrote:
> On 9/18/2024 12:48 PM, Linus Torvalds wrote:
> > On Tue, 17 Sept 2024 at 16:34, Boqun Feng wrote:
> >>
> >> This series introduces hazard pointers [1] to kernel space. A TL;DR
> >> description of hazard pointers is "a scalable refc
On Thu, 19 Sept 2024 at 16:15, Christoph Hellwig wrote:
>
> Agreed. From the description this would seem like a good fit for
> q_usage_counter in the block layer, which currently makes creative use
> of percpu counters.
Yes, if this actually could simplify code that currently used percpu
counter
On Wed, Sep 18, 2024 at 09:18:43AM +0200, Linus Torvalds wrote:
> On Tue, 17 Sept 2024 at 16:34, Boqun Feng wrote:
> >
> > This series introduces hazard pointers [1] to kernel space. A TL;DR
> > description of hazard pointers is "a scalable refcounting mechanim
> > with RCU-like API". More informa
On Thu, 19 Sept 2024 at 00:44, Neeraj Upadhyay wrote:
>
> While we were working on this problem, this refcount scalability issue got
> resolved recently with conditional ref acquisition [3] (however, there are
> new
> developments in apparmor code which might bring back the refcount problem
> [
On 9/18/2024 12:48 PM, Linus Torvalds wrote:
> On Tue, 17 Sept 2024 at 16:34, Boqun Feng wrote:
>>
>> This series introduces hazard pointers [1] to kernel space. A TL;DR
>> description of hazard pointers is "a scalable refcounting mechanim
>> with RCU-like API". More information can be found at [2
On Tue, 17 Sept 2024 at 16:34, Boqun Feng wrote:
>
> This series introduces hazard pointers [1] to kernel space. A TL;DR
> description of hazard pointers is "a scalable refcounting mechanim
> with RCU-like API". More information can be found at [2].
Please give actual "this is useful for X, and h
Hi,
This series introduces hazard pointers [1] to kernel space. A TL;DR
description of hazard pointers is "a scalable refcounting mechanim
with RCU-like API". More information can be found at [2].
The problem we are trying to resolve here is refcount scalability
issues that cannot be resolved sim
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