* Multiple mmap/mprotect/munmap operations in a batch?
@ 2020-04-23 8:19 Josh Triplett
2020-04-23 15:11 ` Jens Axboe
0 siblings, 1 reply; 3+ messages in thread
From: Josh Triplett @ 2020-04-23 8:19 UTC (permalink / raw)
To: io-uring
What would it take for io_uring to support mmap, mprotect, and munmap
operations?
What would it take to process a batch of such operations efficiently
without repeatedly poking mmap_sem and such?
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Multiple mmap/mprotect/munmap operations in a batch?
2020-04-23 8:19 Multiple mmap/mprotect/munmap operations in a batch? Josh Triplett
@ 2020-04-23 15:11 ` Jens Axboe
2020-04-24 18:21 ` Ed Baunton
0 siblings, 1 reply; 3+ messages in thread
From: Jens Axboe @ 2020-04-23 15:11 UTC (permalink / raw)
To: Josh Triplett, io-uring
On 4/23/20 2:19 AM, Josh Triplett wrote:
> What would it take for io_uring to support mmap, mprotect, and munmap
> operations?
Not very much, wiring up something like madvise as an example:
https://git.kernel.dk/cgit/linux-block/commit/?id=c1ca757bd6f4632c510714631ddcc2d13030fe1e
> What would it take to process a batch of such operations efficiently
> without repeatedly poking mmap_sem and such?
Probably just a bit of refactoring, to enable calling the needed helpers
with the mmap_sem already held.
--
Jens Axboe
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Multiple mmap/mprotect/munmap operations in a batch?
2020-04-23 15:11 ` Jens Axboe
@ 2020-04-24 18:21 ` Ed Baunton
0 siblings, 0 replies; 3+ messages in thread
From: Ed Baunton @ 2020-04-24 18:21 UTC (permalink / raw)
To: Jens Axboe; +Cc: Josh Triplett, io-uring
Is there any restriction as to what calls shouldn't be covered with
io_uring? I see the scope is growing over time. For example would
directory operations be appropriate?
Ed
On Thu, 23 Apr 2020 at 11:13, Jens Axboe <axboe@kernel.dk> wrote:
>
> On 4/23/20 2:19 AM, Josh Triplett wrote:
> > What would it take for io_uring to support mmap, mprotect, and munmap
> > operations?
>
> Not very much, wiring up something like madvise as an example:
>
> https://git.kernel.dk/cgit/linux-block/commit/?id=c1ca757bd6f4632c510714631ddcc2d13030fe1e
>
> > What would it take to process a batch of such operations efficiently
> > without repeatedly poking mmap_sem and such?
>
> Probably just a bit of refactoring, to enable calling the needed helpers
> with the mmap_sem already held.
>
> --
> Jens Axboe
>
^ permalink raw reply [flat|nested] 3+ messages in thread
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2020-04-23 8:19 Multiple mmap/mprotect/munmap operations in a batch? Josh Triplett
2020-04-23 15:11 ` Jens Axboe
2020-04-24 18:21 ` Ed Baunton
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