From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([209.51.188.92]:58003) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1goTIn-0003n5-8q for qemu-devel@nongnu.org; Tue, 29 Jan 2019 08:19:45 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1goTIm-0003nu-H0 for qemu-devel@nongnu.org; Tue, 29 Jan 2019 08:19:45 -0500 Received: from mx1.redhat.com ([209.132.183.28]:46184) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1goTIl-0003li-9f for qemu-devel@nongnu.org; Tue, 29 Jan 2019 08:19:43 -0500 From: Bandan Das Date: Tue, 29 Jan 2019 08:19:05 -0500 Message-Id: <20190129131908.27924-1-bsd@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Subject: [Qemu-devel] [PATCH v4 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, eblake@redhat.com, peter.maydell@linaro.org v4: Used KiB for MTP_WRITE_BUF_SZ (1/3) Add back the Suggested-by tag (3/3) 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 | 167 +++++++++++++++++++++++++++++------------------ 1 file changed, 103 insertions(+), 64 deletions(-) --=20 2.19.2