From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([209.51.188.92]:42380) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1go7q2-0005px-Rm for qemu-devel@nongnu.org; Mon, 28 Jan 2019 09:24:39 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1go7q1-0003Ck-3x for qemu-devel@nongnu.org; Mon, 28 Jan 2019 09:24:38 -0500 Received: from mx1.redhat.com ([209.132.183.28]:56616) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1go7q0-00037j-Lp for qemu-devel@nongnu.org; Mon, 28 Jan 2019 09:24:36 -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 3106DDA334 for ; Mon, 28 Jan 2019 14:24:26 +0000 (UTC) From: Bandan Das Date: Mon, 28 Jan 2019 09:24:07 -0500 Message-Id: <20190128142410.11584-1-bsd@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Subject: [Qemu-devel] [PATCH v3 0/3] 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 v3: Added patch 3/3 v2: Rebased on top of master and retested For larger files, not only do we keep reallocating to increase the mtp bu= ffer 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 (3): usb-mtp: Reallocate buffer in multiples of MTP_WRITE_BUF_SZ usb-mtp: breakup MTP write into smaller chunks usb-mtp: replace the homebrew write with qemu_write_full hw/usb/dev-mtp.c | 166 +++++++++++++++++++++++++++++------------------ 1 file changed, 102 insertions(+), 64 deletions(-) --=20 2.19.2