From: "Huang, Kai" <kai.huang@intel.com>
To: "hpa@zytor.com" <hpa@zytor.com>,
"linux-sgx@vger.kernel.org" <linux-sgx@vger.kernel.org>,
"x86@kernel.org" <x86@kernel.org>,
"dave.hansen@linux.intel.com" <dave.hansen@linux.intel.com>,
"cgroups@vger.kernel.org" <cgroups@vger.kernel.org>,
"bp@alien8.de" <bp@alien8.de>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"jarkko@kernel.org" <jarkko@kernel.org>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"haitao.huang@linux.intel.com" <haitao.huang@linux.intel.com>,
"Mehta, Sohil" <sohil.mehta@intel.com>,
"tj@kernel.org" <tj@kernel.org>,
"mingo@redhat.com" <mingo@redhat.com>
Cc: "kristen@linux.intel.com" <kristen@linux.intel.com>,
"yangjie@microsoft.com" <yangjie@microsoft.com>,
"Li, Zhiquan1" <zhiquan1.li@intel.com>, "Christopherson,,
Sean" <seanjc@google.com>,
"mikko.ylinen@linux.intel.com" <mikko.ylinen@linux.intel.com>,
"Zhang, Bo" <zhanb@microsoft.com>,
"anakrish@microsoft.com" <anakrish@microsoft.com>
Subject: Re: [PATCH v5 07/18] x86/sgx: Introduce RECLAIM_IN_PROGRESS state
Date: Wed, 27 Sep 2023 10:42:16 +0000 [thread overview]
Message-ID: <4c88fc578d678ed1893f39bb2fb9b2b0e152f9b3.camel@intel.com> (raw)
In-Reply-To: <20230923030657.16148-8-haitao.huang@linux.intel.com>
> @@ -312,13 +312,15 @@ static void sgx_reclaim_pages(void)
> list_del_init(&epc_page->list);
> encl_page = epc_page->owner;
>
> - if (kref_get_unless_zero(&encl_page->encl->refcount) != 0)
> + if (kref_get_unless_zero(&encl_page->encl->refcount) != 0) {
> + sgx_epc_page_set_state(epc_page, SGX_EPC_PAGE_RECLAIM_IN_PROGRESS);
> chunk[cnt++] = epc_page;
> - else
> + } else {
> /* The owner is freeing the page. No need to add the
> * page back to the list of reclaimable pages.
> */
Please use proper comment style:
For single line comment:
/* ... */
For multiple lines comment:
/*
* ...
*/
> sgx_epc_page_reset_state(epc_page);
> + }
Nit: unintended new {} around 'else'?
> }
> spin_unlock(&sgx_global_lru.lock);
>
> @@ -528,16 +530,13 @@ void sgx_record_epc_page(struct sgx_epc_page *page, unsigned long flags)
> int sgx_drop_epc_page(struct sgx_epc_page *page)
> {
> spin_lock(&sgx_global_lru.lock);
> - if (sgx_epc_page_reclaimable(page->flags)) {
> - /* The page is being reclaimed. */
> - if (list_empty(&page->list)) {
> - spin_unlock(&sgx_global_lru.lock);
> - return -EBUSY;
> - }
> -
> - list_del(&page->list);
> - sgx_epc_page_reset_state(page);
> + if (sgx_epc_page_reclaim_in_progress(page->flags)) {
> + spin_unlock(&sgx_global_lru.lock);
> + return -EBUSY;
> }
> +
> + list_del(&page->list);
> + sgx_epc_page_reset_state(page);
> spin_unlock(&sgx_global_lru.lock);
>
> return 0;
> diff --git a/arch/x86/kernel/cpu/sgx/sgx.h b/arch/x86/kernel/cpu/sgx/sgx.h
> index 2faeb40b345f..764cec23f4e5 100644
> --- a/arch/x86/kernel/cpu/sgx/sgx.h
> +++ b/arch/x86/kernel/cpu/sgx/sgx.h
> @@ -40,6 +40,8 @@ enum sgx_epc_page_state {
>
> /* Page is in use and tracked in a reclaimable LRU list
> * Becomes NOT_TRACKED after sgx_drop_epc()
> + * Becomes RECLAIM_IN_PROGRESS in sgx_reclaim_pages() when identified
> + * for reclaiming
> */
> SGX_EPC_PAGE_RECLAIMABLE = 2,
>
> @@ -50,6 +52,14 @@ enum sgx_epc_page_state {
> */
> SGX_EPC_PAGE_UNRECLAIMABLE = 3,
>
> + /* Page is being prepared for reclamation, tracked in a temporary
> + * isolated list by the reclaimer.
> + * Changes in sgx_reclaim_pages() back to RECLAIMABLE if preparation
> + * fails for any reason.
> + * Becomes NOT_TRACKED if reclaimed successfully in sgx_reclaim_pages()
> + * and immediately sgx_free_epc() is called to make it FREE.
> + */
Ditto for the comment style.
And please use blank line to separate paragraphs for better readability.
next prev parent reply other threads:[~2023-09-27 10:42 UTC|newest]
Thread overview: 119+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-23 3:06 [PATCH v5 00/18] Add Cgroup support for SGX EPC memory Haitao Huang
2023-09-23 3:06 ` [PATCH v5 01/18] cgroup/misc: Add per resource callbacks for CSS events Haitao Huang
2023-09-25 17:09 ` Jarkko Sakkinen
2023-09-26 3:04 ` Haitao Huang
2023-09-26 13:10 ` Jarkko Sakkinen
2023-09-26 13:13 ` Jarkko Sakkinen
2023-09-27 1:56 ` Haitao Huang
2023-10-02 22:47 ` Jarkko Sakkinen
2023-10-02 22:55 ` Jarkko Sakkinen
2023-10-04 15:45 ` Haitao Huang
2023-10-04 17:18 ` Tejun Heo
2023-09-27 9:20 ` Huang, Kai
2023-10-03 14:29 ` Haitao Huang
2023-10-17 18:55 ` Michal Koutný
2023-09-23 3:06 ` [PATCH v5 02/18] cgroup/misc: Add SGX EPC resource type and export APIs for SGX driver Haitao Huang
2023-09-25 18:50 ` Tejun Heo
2023-09-28 3:59 ` Huang, Kai
2023-10-03 7:00 ` Haitao Huang
2023-10-03 19:33 ` Huang, Kai
2023-09-23 3:06 ` [PATCH v5 03/18] x86/sgx: Add sgx_epc_lru_lists to encapsulate LRU lists Haitao Huang
2023-09-23 3:06 ` [PATCH v5 04/18] x86/sgx: Use sgx_epc_lru_lists for existing active page list Haitao Huang
2023-09-23 3:06 ` [PATCH v5 05/18] x86/sgx: Store reclaimable EPC pages in sgx_epc_lru_lists Haitao Huang
2023-09-27 10:14 ` Huang, Kai
2023-09-23 3:06 ` [PATCH v5 06/18] x86/sgx: Introduce EPC page states Haitao Huang
2023-09-25 17:11 ` Jarkko Sakkinen
2023-09-27 10:28 ` Huang, Kai
2023-10-03 4:49 ` Haitao Huang
2023-10-03 20:03 ` Huang, Kai
2023-10-04 15:24 ` Haitao Huang
2023-10-04 21:05 ` Huang, Kai
2023-09-23 3:06 ` [PATCH v5 07/18] x86/sgx: Introduce RECLAIM_IN_PROGRESS state Haitao Huang
2023-09-25 17:13 ` Jarkko Sakkinen
2023-09-27 10:42 ` Huang, Kai [this message]
2023-09-23 3:06 ` [PATCH v5 08/18] x86/sgx: Use a list to track to-be-reclaimed pages Haitao Huang
2023-09-28 9:28 ` Huang, Kai
2023-10-03 5:09 ` Haitao Huang
2023-09-23 3:06 ` [PATCH v5 09/18] x86/sgx: Store struct sgx_encl when allocating new VA pages Haitao Huang
2023-09-27 11:14 ` Huang, Kai
2023-09-27 15:35 ` Haitao Huang
2023-09-27 21:21 ` Huang, Kai
2023-09-29 15:06 ` Haitao Huang
2023-10-02 11:05 ` Huang, Kai
2023-09-27 11:35 ` Huang, Kai
2023-10-03 6:45 ` Haitao Huang
2023-10-03 20:07 ` Huang, Kai
2023-10-04 15:03 ` Haitao Huang
2023-10-04 21:13 ` Huang, Kai
2023-10-05 4:22 ` Haitao Huang
2023-10-05 6:49 ` Huang, Kai
2023-09-23 3:06 ` [PATCH v5 10/18] x86/sgx: Add EPC page flags to identify owner types Haitao Huang
2023-09-23 3:06 ` [PATCH v5 11/18] x86/sgx: store unreclaimable pages in LRU lists Haitao Huang
2023-09-27 11:57 ` Huang, Kai
2023-10-03 5:42 ` Haitao Huang
2023-09-28 9:41 ` Huang, Kai
2023-10-03 5:15 ` Haitao Huang
2023-10-03 20:12 ` Huang, Kai
2023-09-23 3:06 ` [PATCH v5 12/18] x86/sgx: Add EPC OOM path to forcefully reclaim EPC Haitao Huang
2023-10-09 23:45 ` Huang, Kai
2023-10-10 0:23 ` Sean Christopherson
2023-10-10 0:50 ` Huang, Kai
2023-10-10 1:34 ` Huang, Kai
2023-10-10 16:49 ` Haitao Huang
2023-10-11 0:51 ` Huang, Kai
2023-10-12 13:27 ` Haitao Huang
2023-10-16 10:57 ` Huang, Kai
2023-10-16 19:52 ` Haitao Huang
2023-10-16 21:09 ` Huang, Kai
2023-10-17 0:10 ` Haitao Huang
2023-10-17 1:34 ` Huang, Kai
2023-10-17 12:58 ` Haitao Huang
2023-10-17 18:54 ` Michal Koutný
2023-10-17 19:13 ` Michal Koutný
2023-10-18 4:39 ` Haitao Huang
2023-10-18 4:37 ` Haitao Huang
2023-10-18 13:55 ` Dave Hansen
2023-10-18 15:26 ` Haitao Huang
2023-10-18 15:37 ` Dave Hansen
2023-10-18 15:52 ` Michal Koutný
2023-10-18 16:25 ` Haitao Huang
2023-10-16 21:32 ` Sean Christopherson
2023-10-17 0:09 ` Haitao Huang
2023-10-17 15:43 ` Sean Christopherson
2023-10-17 11:49 ` Mikko Ylinen
2023-10-11 1:14 ` Huang, Kai
2023-10-16 11:02 ` Huang, Kai
2023-10-10 1:42 ` Haitao Huang
2023-10-10 2:23 ` Huang, Kai
2023-10-10 13:26 ` Haitao Huang
2023-10-11 0:01 ` Sean Christopherson
2023-10-11 15:02 ` Haitao Huang
2023-10-10 1:04 ` Haitao Huang
2023-10-10 1:18 ` Huang, Kai
2023-10-10 1:38 ` Haitao Huang
2023-10-10 2:12 ` Huang, Kai
2023-10-10 17:05 ` Haitao Huang
2023-10-11 0:31 ` Huang, Kai
2023-10-11 16:04 ` Haitao Huang
2023-09-23 3:06 ` [PATCH v5 13/18] x86/sgx: Expose sgx_reclaim_pages() for use by EPC cgroup Haitao Huang
2023-10-05 12:24 ` Huang, Kai
2023-10-05 19:23 ` Haitao Huang
2023-10-05 20:25 ` Huang, Kai
2023-09-23 3:06 ` [PATCH v5 14/18] x86/sgx: Add helper to grab pages from an arbitrary EPC LRU Haitao Huang
2023-09-23 3:06 ` [PATCH v5 15/18] x86/sgx: Prepare for multiple LRUs Haitao Huang
2023-10-05 12:30 ` Huang, Kai
2023-10-05 19:33 ` Haitao Huang
2023-10-05 20:38 ` Huang, Kai
2023-09-23 3:06 ` [PATCH v5 16/18] x86/sgx: Limit process EPC usage with misc cgroup controller Haitao Huang
2023-09-25 17:15 ` Jarkko Sakkinen
2023-10-05 21:01 ` Huang, Kai
2023-10-10 0:12 ` Huang, Kai
2023-10-10 0:16 ` Huang, Kai
2023-10-10 0:26 ` Huang, Kai
2023-10-22 18:26 ` Haitao Huang
2023-10-10 9:19 ` Huang, Kai
2023-10-10 9:32 ` Huang, Kai
2023-10-17 18:54 ` Michal Koutný
2023-10-19 16:05 ` Haitao Huang
2023-09-23 3:06 ` [PATCH v5 17/18] Docs/x86/sgx: Add description for cgroup support Haitao Huang
2023-09-23 3:06 ` [PATCH v5 18/18] selftests/sgx: Add scripts for EPC cgroup testing Haitao Huang
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4c88fc578d678ed1893f39bb2fb9b2b0e152f9b3.camel@intel.com \
--to=kai.huang@intel.com \
--cc=anakrish@microsoft.com \
--cc=bp@alien8.de \
--cc=cgroups@vger.kernel.org \
--cc=dave.hansen@linux.intel.com \
--cc=haitao.huang@linux.intel.com \
--cc=hpa@zytor.com \
--cc=jarkko@kernel.org \
--cc=kristen@linux.intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-sgx@vger.kernel.org \
--cc=mikko.ylinen@linux.intel.com \
--cc=mingo@redhat.com \
--cc=seanjc@google.com \
--cc=sohil.mehta@intel.com \
--cc=tglx@linutronix.de \
--cc=tj@kernel.org \
--cc=x86@kernel.org \
--cc=yangjie@microsoft.com \
--cc=zhanb@microsoft.com \
--cc=zhiquan1.li@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).