在 8/1/2025 12:17 AM, Mikulas Patocka 写道:
On Tue, 29 Jul 2025, Dongsheng Yang wrote:
Just a suggestion for performance improvement: when you hold a
spinlock a you need to allocate some memory, you must drop the
spinlock, allocate it with GFP_NOIO, reacquire the spinlock and
recheck the state.
On Tue, 29 Jul 2025, Dongsheng Yang wrote:
> > > > Just a suggestion for performance improvement: when you hold a
> > > > spinlock a you need to allocate some memory, you must drop the
> > > > spinlock, allocate it with GFP_NOIO, reacquire the spinlock and
> > > > recheck the state. You can
在 7/29/2025 5:23 AM, Mikulas Patocka 写道:
Hi
On Fri, 25 Jul 2025, Dongsheng Yang wrote:
* get_n_vecs: what if "data" is not page-aligned? is that possible?
Yes, it's possible, so I am using DIV_ROUND_UP() to calculate the n_vecs.
DIV_ROUND_UP is not sufficient - suppose that "data" is 0xf00
Hi
On Fri, 25 Jul 2025, Dongsheng Yang wrote:
> > * get_n_vecs: what if "data" is not page-aligned? is that possible?
> Yes, it's possible, so I am using DIV_ROUND_UP() to calculate the n_vecs.
DIV_ROUND_UP is not sufficient - suppose that "data" is 0xf00 and "len" is
0x200. DIV_ROUND_UP(len, P
在 7/25/2025 12:48 AM, Mikulas Patocka 写道:
On Tue, 15 Jul 2025, Dongsheng Yang wrote:
Hi Mikulas,
This is V4 for dm-pcache, please help to review.
Hi
The mempool operations seem ok.
Here are some comments:
* backing_req_cache and backing_bvec_cache should be static
Thanx
* get_
On Tue, 15 Jul 2025, Dongsheng Yang wrote:
> Hi Mikulas,
> This is V4 for dm-pcache, please help to review.
Hi
The mempool operations seem ok.
Here are some comments:
* backing_req_cache and backing_bvec_cache should be static
* get_n_vecs: what if "data" is not page-aligned? is that
Hi Mikulas,
This is V4 for dm-pcache, please help to review.
Code:
https://github.com/DataTravelGuide/linux tags/pcache_v4
Changelogs
V4 from V3:
- go back to use mempool for allocation of cache_key and
backing_dev_req.
- introduce backing_bvec_cache and ba
