From nobody Sat Feb 7 05:01:24 2026 Received: from mail-pf1-f201.google.com (mail-pf1-f201.google.com [209.85.210.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 280461B394E for ; Tue, 26 Nov 2024 22:49:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732661390; cv=none; b=NgZ2qCZ78RSAMGOw6UEZRYaZU+ZR3ycoVPlEKcSWe5pukPDjaY2+Adz1DppCRlJ+RRZa11D/VpPGtUA0Z2nu9ip+x8AddwA2mCxIDCCwlRrt3WXo82RUxT7xsEYsJH9lANs8/tG4DuduH1Bcx2JghItjArHAnKCmsUz0lzIIHB0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732661390; c=relaxed/simple; bh=HO4kGLHdZ46KJzFqmtjTFi+nQsgV3QcEAv4sUsSt5xo=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=d1Rfax241Y1cWS2zz+ClmXiOGEKmbqTeVv2sMLXDqSRkyMSunczsgkLJ0vrtGEidI8rYgwl8qEA9x7O6h8O28MUZWD2OAXehqbwjaLCo5SfumItYUWhL0WEf5tApAg9YtlHMK5sjrAmmv1Zji3EnAg5WULVNWuFo92ehhrpgANs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--salomondush.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=ln7f3+Ma; arc=none smtp.client-ip=209.85.210.201 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--salomondush.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="ln7f3+Ma" Received: by mail-pf1-f201.google.com with SMTP id d2e1a72fcca58-724f7c09c58so3338541b3a.3 for ; Tue, 26 Nov 2024 14:49:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1732661387; x=1733266187; darn=vger.kernel.org; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=9P7Y6hO1KRaALzgNc/8yHI8FvE407ycTLKy/FIi5bOI=; b=ln7f3+ManIYlw+pGafejt5GaRFRJhYVVVni6KW1VnVAtDfbMr7zVNRrDNvMf/td2Hj ceChdLN5T9mQsGlkZ32Al+cL7RJAk2kJ2E9H5sTeQ9H9/nsFFr49Hj/uRtMIim2GeCxW /p8YvlQOqOQggLnt+BVVlGUXYfcHQKf7xAPBD2Ln6OOB5TZah/Z7HIpVRscEcOmYUrjL GRNQAdn/7WmGpKG+lvDgi8D6yqBopFOKWy8qovACqH+h70c6px8EcsLhzCfSFFnBAaoR BMjnlrQ5x+qGzFvOQiQESt/b3c6ZYkxUVWMapxjKsad4AWcGZDnAeOoPMoWq7qsoTQm2 AbuA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1732661387; x=1733266187; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=9P7Y6hO1KRaALzgNc/8yHI8FvE407ycTLKy/FIi5bOI=; b=eyv4mJA2y0FmIdp+UlAoV33te3B8Gpq670d9HPw1CUGvqCS6Nr5q1TSpD3yyGFwwNF 5dE4BJhaY8n7+2nqApA+Adrm6LQFYEhjXD+uKuT9VAX7EK5tJIo4XKhwzOhMOrS2wzSY rPyZlpI/nMsgQ+WVy5zTp/Cjn7PrZf11wyMpoq/PPggJYsAQwpXPtzATvJ5tykCcx1Ig DPmDk24SAwhLttJexlxcc9+bmzCjA1MPAV1odoOeXI/EW6SahgiSaKJFkuT2hL6G+mjc JkSJPtMaPUMCper8J2cOTX/2LVYcqVtij1lBO8N0yOKrJylpFDwWzon5WnVc0om0Fy6h scUw== X-Forwarded-Encrypted: i=1; AJvYcCVy4oyrsReKk4wSRv1mqf0Izig7dxRn1Nf30UQm1SZ+I4gxqQdCv5JLpFb6lM8NfnSJbgn6kOszYbSrEtM=@vger.kernel.org X-Gm-Message-State: AOJu0Yy1yVV3vtLzVRuq9DRyYXJXyZ6ouGhVFgPKf9q0Tz0DDpj0pnc6 FSd7xs/mrEPgzacfKCkrafcUATs95qpnIbCouaedQs7OFmmX9dLG29IqFHoAzFeVGzXKe9rUfp4 lU05uUoVcBS3PAFEhTp55nQ== X-Google-Smtp-Source: AGHT+IGBAWYeOEhaz87TjdeEOr5B5hoQsFgmzgO/CGWAO8M7kpMSblZXDhBBLm/oE/W0R77+i9RRo26nBAsOi90Pdw== X-Received: from pfau6.prod.google.com ([2002:a05:6a00:aa86:b0:725:31af:9cfb]) (user=salomondush job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a00:230b:b0:71e:2a0:b0b8 with SMTP id d2e1a72fcca58-7252ffd2b20mr996637b3a.1.1732661387475; Tue, 26 Nov 2024 14:49:47 -0800 (PST) Date: Tue, 26 Nov 2024 22:49:23 +0000 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.47.0.338.g60cca15819-goog Message-ID: <20241126224923.973528-1-salomondush@google.com> Subject: [PATCH] scsi: pm80xx: Increase reserved tags from 8 to 128 From: Salomon Dushimirimana To: Jack Wang , "James E . J . Bottomley" , "Martin K . Petersen" Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, Igor Pylypiv , Salomon Dushimirimana Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Igor Pylypiv Increase the number of reserved tags to prevent command processing failures when the driver is under stress. 8 reserved tags are quickly getting all used up leading to errors when command completions are delayed. The driver needs ~512 ccbs/tags for maximum I/O utilization: 16 (max disks) * 32 (max SATA queue depth) =3D ~512 ccbs/tags. By reserving 128 tags the driver will still have plenty of tags/ccbs left: 1024 (max ccbs) - 128 (reserved slot) =3D 896 tags/ccbs left. Signed-off-by: Igor Pylypiv Signed-off-by: Salomon Dushimirimana --- drivers/scsi/pm8001/pm8001_defs.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/scsi/pm8001/pm8001_defs.h b/drivers/scsi/pm8001/pm8001= _defs.h index 501b574239e8..abe6560a5817 100644 --- a/drivers/scsi/pm8001/pm8001_defs.h +++ b/drivers/scsi/pm8001/pm8001_defs.h @@ -90,7 +90,7 @@ enum port_type { #define PM8001_MAX_PORTS 16 /* max. possible ports */ #define PM8001_MAX_DEVICES 2048 /* max supported device */ #define PM8001_MAX_MSIX_VEC 64 /* max msi-x int for spcv/ve */ -#define PM8001_RESERVE_SLOT 8 +#define PM8001_RESERVE_SLOT 128 =20 #define CONFIG_SCSI_PM8001_MAX_DMA_SG 528 #define PM8001_MAX_DMA_SG CONFIG_SCSI_PM8001_MAX_DMA_SG --=20 2.47.0.338.g60cca15819-goog