From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from 011.lax.mailroute.net (011.lax.mailroute.net [199.89.1.14]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 193EA33E372 for ; Mon, 26 Jan 2026 17:04:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=199.89.1.14 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769447096; cv=none; b=FsWEDE0SCcG7sTI0pO2aN+Fht7mpYgWAaUuqv3HBeZBd6WzpfBpGRWpGbrE8mNFXXGMHO98KpPXVAqfVsOWFrcHcZeSlNngHFz0lWM7PtxjwnZGoJYhINt5vsI9W1JVyo51OCLr7CbiwCzSBURDpulHZDQ1eQH4movlgdrfPzfM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769447096; c=relaxed/simple; bh=DzH71sGLTHY/4umdgPz2Kx0QrBrLABDLct1KfBk3znQ=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=ISrABUXsq11XPEhCVMN18sf9WINP2bx3xmCOUUMAhnuNnaCFcBJSwvjcFWK1+/Ub4ZSehcFZU9vsK9Shrj+FgWSEnEVHs/QAT1r6PLNu5sK853Baw9fAQo+g7gYi8oCsVbLQqCku/Igm35rV0upt3PStkabDkgn11M7yMs9gAmM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=acm.org; spf=pass smtp.mailfrom=acm.org; dkim=pass (2048-bit key) header.d=acm.org header.i=@acm.org header.b=aQq8HjPM; arc=none smtp.client-ip=199.89.1.14 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=acm.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=acm.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=acm.org header.i=@acm.org header.b="aQq8HjPM" Received: from localhost (localhost [127.0.0.1]) by 011.lax.mailroute.net (Postfix) with ESMTP id 4f0FJk56Xvz1XM6Jf; Mon, 26 Jan 2026 17:04:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=acm.org; h= content-transfer-encoding:content-type:content-type:in-reply-to :from:from:content-language:references:subject:subject :user-agent:mime-version:date:date:message-id:received:received; s=mr01; t=1769447093; x=1772039094; bh=sdASKopwoGV8Tlli2UBc+oPt bWwSMfk3K/1cyNX5XMY=; b=aQq8HjPMqlBDgiFixDHNhub9ApJtHBS63dKSnOQ1 8NIn34KW5BISpgdaZH1BDxAlCULW/zhujBi7tN7mWMu/aMdHxtT3M80u+ENHPrPm PRSV2WB5lDe5B6Br8AAJeHxEXcMCG6cZkyotuB+57CLiam12ouytJu8X3tT3BlUm wgD+RSytE3fGBeupKDQO3NgngoNSewSoAeTkg6vFkdlwBqQkJZpR2/jT6+uKy6zn ZtFJDNF0cid4P7xKI4fXUyedfhOLtB/PfomebhrV8bBCK46bpk71NBKMaZ5TfvSx LQ5+kf2lIJgNXVK1OV5RQ/HYWgUm0Q8km45Wn/9rZPhnoQ== X-Virus-Scanned: by MailRoute Received: from 011.lax.mailroute.net ([127.0.0.1]) by localhost (011.lax [127.0.0.1]) (mroute_mailscanner, port 10029) with LMTP id bl6d10Cmguzz; Mon, 26 Jan 2026 17:04:53 +0000 (UTC) Received: from [100.119.48.131] (unknown [104.135.180.219]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: bvanassche@acm.org) by 011.lax.mailroute.net (Postfix) with ESMTPSA id 4f0FJg59tQz1XM5kD; Mon, 26 Jan 2026 17:04:51 +0000 (UTC) Message-ID: <1f5708a2-b00a-4be1-a005-c5137ce5863b@acm.org> Date: Mon, 26 Jan 2026 09:04:50 -0800 Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/3] scsi: sg: Resolve soft lockup issue when opening /dev/sgX To: Yang Erkun , dgilbert@interlog.com, James.Bottomley@HansenPartnership.com, martin.petersen@oracle.com, linux-scsi@vger.kernel.org Cc: yangerkun@huaweicloud.com References: <20260126132745.1830629-1-yangerkun@huawei.com> <20260126132745.1830629-3-yangerkun@huawei.com> Content-Language: en-US From: Bart Van Assche In-Reply-To: <20260126132745.1830629-3-yangerkun@huawei.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 1/26/26 5:27 AM, Yang Erkun wrote: > + /* limit "big buff" to 1 MB */ > + if (size < 0 || size > 1048576) > + return -ERANGE; Why 1 MB? Please explain this in the patch description. Thanks, Bart.