From: Kristen Carlson Accardi <kristen@linux.intel.com>
To: linux-kernel@vger.kernel.org, linux-sgx@vger.kernel.org,
cgroups@vger.kernel.org, Jarkko Sakkinen <jarkko@kernel.org>,
Dave Hansen <dave.hansen@linux.intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>
Cc: Kristen Carlson Accardi <kristen@linux.intel.com>,
Sean Christopherson <seanjc@google.com>
Subject: [RFC PATCH 13/20] x86/sgx: Prepare for multiple LRUs
Date: Thu, 22 Sep 2022 10:10:50 -0700 [thread overview]
Message-ID: <20220922171057.1236139-14-kristen@linux.intel.com> (raw)
In-Reply-To: <20220922171057.1236139-1-kristen@linux.intel.com>
From: Sean Christopherson <sean.j.christopherson@intel.com>
Add sgx_can_reclaim() wrapper so that in a subsequent patch, multiple LRUs
can be used cleanly.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com>
Cc: Sean Christopherson <seanjc@google.com>
---
arch/x86/kernel/cpu/sgx/main.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/cpu/sgx/main.c b/arch/x86/kernel/cpu/sgx/main.c
index 9f2cb264a347..ac49346302ed 100644
--- a/arch/x86/kernel/cpu/sgx/main.c
+++ b/arch/x86/kernel/cpu/sgx/main.c
@@ -386,10 +386,15 @@ static int sgx_reclaim_pages(int nr_to_scan, bool ignore_age)
return i;
}
+static bool sgx_can_reclaim(void)
+{
+ return !list_empty(&sgx_global_lru.reclaimable);
+}
+
static bool sgx_should_reclaim(unsigned long watermark)
{
return atomic_long_read(&sgx_nr_free_pages) < watermark &&
- !list_empty(&sgx_global_lru.reclaimable);
+ sgx_can_reclaim();
}
/*
@@ -588,7 +593,7 @@ struct sgx_epc_page *sgx_alloc_epc_page(void *owner, bool reclaim)
break;
}
- if (list_empty(&sgx_global_lru.reclaimable))
+ if (!sgx_can_reclaim())
return ERR_PTR(-ENOMEM);
if (!reclaim) {
--
2.37.3
next prev parent reply other threads:[~2022-09-22 17:13 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-22 17:10 [RFC PATCH 00/20] Add Cgroup support for SGX EPC memory Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 01/20] x86/sgx: Call cond_resched() at the end of sgx_reclaim_pages() Kristen Carlson Accardi
2022-09-23 12:32 ` Jarkko Sakkinen
2022-09-23 12:35 ` Jarkko Sakkinen
2022-09-23 12:37 ` Jarkko Sakkinen
2022-09-22 17:10 ` [RFC PATCH 02/20] x86/sgx: Store EPC page owner as a 'void *' to handle multiple users Kristen Carlson Accardi
2022-09-22 18:54 ` Dave Hansen
2022-09-23 12:49 ` Jarkko Sakkinen
2022-09-22 17:10 ` [RFC PATCH 03/20] x86/sgx: Track owning enclave in VA EPC pages Kristen Carlson Accardi
2022-09-22 18:55 ` Dave Hansen
2022-09-22 20:04 ` Kristen Carlson Accardi
2022-09-22 21:39 ` Dave Hansen
2022-09-23 12:52 ` Jarkko Sakkinen
2022-09-22 17:10 ` [RFC PATCH 04/20] x86/sgx: Add 'struct sgx_epc_lru' to encapsulate lru list(s) Kristen Carlson Accardi
2022-09-23 13:20 ` Jarkko Sakkinen
2022-09-29 23:04 ` Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 05/20] x86/sgx: Introduce unreclaimable EPC page lists Kristen Carlson Accardi
2022-09-23 13:29 ` Jarkko Sakkinen
2022-09-22 17:10 ` [RFC PATCH 06/20] x86/sgx: Introduce RECLAIM_IN_PROGRESS flag for EPC pages Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 07/20] x86/sgx: Use a list to track to-be-reclaimed pages during reclaim Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 08/20] x86/sgx: Add EPC page flags to identify type of page Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 09/20] x86/sgx: Allow reclaiming up to 32 pages, but scan 16 by default Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 10/20] x86/sgx: Return the number of EPC pages that were successfully reclaimed Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 11/20] x86/sgx: Add option to ignore age of page during EPC reclaim Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 12/20] x86/sgx: Add helper to retrieve SGX EPC LRU given an EPC page Kristen Carlson Accardi
2022-09-22 17:10 ` Kristen Carlson Accardi [this message]
2022-09-22 17:10 ` [RFC PATCH 14/20] x86/sgx: Expose sgx_reclaim_pages() for use by EPC cgroup Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 15/20] x86/sgx: Add helper to grab pages from an arbitrary EPC LRU Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 16/20] x86/sgx: Add EPC OOM path to forcefully reclaim EPC Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 17/20] cgroup, x86/sgx: Add SGX EPC cgroup controller Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 18/20] x86/sgx: Enable EPC cgroup controller in SGX core Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 19/20] x86/sgx: Add stats and events interfaces to EPC cgroup controller Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 20/20] docs, cgroup, x86/sgx: Add SGX EPC cgroup controller documentation Kristen Carlson Accardi
2022-09-22 17:41 ` [RFC PATCH 00/20] Add Cgroup support for SGX EPC memory Tejun Heo
2022-09-22 18:59 ` Kristen Carlson Accardi
2022-09-22 19:08 ` Tejun Heo
2022-09-22 21:03 ` Dave Hansen
2022-09-24 0:09 ` Tejun Heo
2022-09-26 18:30 ` Kristen Carlson Accardi
2022-10-07 16:39 ` Kristen Carlson Accardi
2022-10-07 16:42 ` Tejun Heo
2022-10-07 16:46 ` Kristen Carlson Accardi
2022-09-23 12:24 ` Jarkko Sakkinen
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