From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37041) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gNPhz-0002z3-TS for qemu-devel@nongnu.org; Thu, 15 Nov 2018 17:01:57 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gNPhu-0000HX-HQ for qemu-devel@nongnu.org; Thu, 15 Nov 2018 17:01:55 -0500 Received: from mx1.redhat.com ([209.132.183.28]:51228) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gNPht-0000Eo-6z for qemu-devel@nongnu.org; Thu, 15 Nov 2018 17:01:50 -0500 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id B85D43001E72 for ; Thu, 15 Nov 2018 22:01:45 +0000 (UTC) From: Bandan Das Date: Thu, 15 Nov 2018 17:01:30 -0500 Message-Id: <20181115220132.6531-1-bsd@redhat.com> Subject: [Qemu-devel] [PATCH 0/2] Break down the MTP write operation List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: kraxel@redhat.com For larger files, not only do we keep reallocating to increase the mtp buffer size, the write also happens in one go. This does two things: Write to file upto a certain data size we have received so far and second, reuse the buffer again instead of reallocating to a larger buffer size. Tested with different file sizes on a Linux guest. Bandan Das (2): usb-mtp: Reallocate buffer in multiples of MTP_WRITE_BUF_SZ usb-mtp: breakup MTP write into smaller chunks hw/usb/dev-mtp.c | 153 +++++++++++++++++++++++++++++++++++-------------------- 1 file changed, 99 insertions(+), 54 deletions(-) -- 2.14.4