From: Vipin P R <vipinp@vmware.com>
To: anatoly.burakov@intel.com
Cc: dev@dpdk.org, Vipin P R <vipinp@vmware.com>, stable@dpdk.org
Subject: [PATCH 1/2] Memory Allocation: Fixes ignore_msk during find_next_n() in fb_array library
Date: Fri, 13 Jan 2023 13:14:28 +0000 [thread overview]
Message-ID: <1673615669-21011-2-git-send-email-vipinp@vmware.com> (raw)
In-Reply-To: <1673615669-21011-1-git-send-email-vipinp@vmware.com>
Ignore mask ignores essential bits WHICH could have been contiguous.
This commit aims to rectify that
Cc: stable@dpdk.org
Signed-off-by: Vipin P R <vipinp@vmware.com>
Acked-by: Kumara Parameshwaran <kparameshwar@vmware.com>
---
Depends-on: 0001-Memory-Allocation-Fixes-ms_idx-jump-lookahead-during.patch
Depends-on: 0002-Memory-Allocation-Fixes-ms_idx-jump-lookbehind-durin.patch
---
lib/eal/common/eal_common_fbarray.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/lib/eal/common/eal_common_fbarray.c b/lib/eal/common/eal_common_fbarray.c
index 90240e8..313681a 100644
--- a/lib/eal/common/eal_common_fbarray.c
+++ b/lib/eal/common/eal_common_fbarray.c
@@ -235,7 +235,12 @@ find_next_n(const struct rte_fbarray *arr, unsigned int start, unsigned int n,
* no runs in the space we've lookahead-scanned
* as well, so skip that on next iteration.
*/
- ignore_msk = ~((1ULL << need) - 1);
+ if (!lookahead_msk) {
+ /* There aren't "need" number of contiguous bits anywhere in the mask.
+ * Ignore these many number of bits from LSB for the next iteration.
+ */
+ ignore_msk = ~((1ULL << need) - 1);
+ }
msk_idx = lookahead_idx - 1;
break;
}
--
2.7.4
next prev parent reply other threads:[~2023-01-15 20:12 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-13 13:14 [PATCH 0/2] *** Memory Allocation: Fixes ignore_msk during find_next_n() in fb_array library*** Vipin P R
2023-01-13 13:14 ` Vipin P R [this message]
2023-05-19 16:23 ` [PATCH 1/2] Memory Allocation: Fixes ignore_msk during find_next_n() in fb_array library Burakov, Anatoly
2023-01-13 13:14 ` [PATCH 2/2] Memory Allocation: Alternative fix for " Vipin P R
2023-05-19 16:45 ` Burakov, Anatoly
2023-05-22 5:12 ` Vipin P R
2023-02-20 11:03 ` [PATCH 0/2] *** Memory Allocation: Fixes ignore_msk during find_next_n() in fb_array library*** Thomas Monjalon
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