From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48916) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fs3Fc-0003zQ-Ih for qemu-devel@nongnu.org; Tue, 21 Aug 2018 05:47:01 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fs3FX-00084J-OJ for qemu-devel@nongnu.org; Tue, 21 Aug 2018 05:47:00 -0400 From: Anton Nefedov Date: Tue, 21 Aug 2018 12:46:18 +0300 Message-Id: <1534844779-118784-8-git-send-email-anton.nefedov@virtuozzo.com> In-Reply-To: <1534844779-118784-1-git-send-email-anton.nefedov@virtuozzo.com> References: <1534844779-118784-1-git-send-email-anton.nefedov@virtuozzo.com> MIME-Version: 1.0 Content-Type: text/plain Subject: [Qemu-devel] [PATCH v4 7/8] file-posix: account discard operations List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: qemu-block@nongnu.org, kwolf@redhat.com, mreitz@redhat.com, armbru@redhat.com, jsnow@redhat.com, pbonzini@redhat.com, famz@redhat.com, eblake@redhat.com, den@virtuozzo.com, berto@igalia.com, Anton Nefedov This will help to identify how many of the user-issued discard operations (accounted on a device level) have actually suceeded down on the host file (even though the numbers will not be exactly the same if non-raw format driver is used (e.g. qcow2 sending metadata discards)). Note that these numbers will not include discards triggered by write-zeroes + MAY_UNMAP calls. Signed-off-by: Anton Nefedov --- block/file-posix.c | 28 +++++++++++++++++++++++++--- 1 file changed, 25 insertions(+), 3 deletions(-) diff --git a/block/file-posix.c b/block/file-posix.c index fe83cbf..c420f76 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -163,6 +163,11 @@ typedef struct BDRVRawState { bool has_fallocate; bool needs_alignment; bool check_cache_dropped; + struct { + int64_t discard_nb_ok; + int64_t discard_nb_failed; + int64_t discard_bytes_ok; + } stats; PRManager *pr_mgr; } BDRVRawState; @@ -2575,12 +2580,25 @@ static void coroutine_fn raw_co_invalidate_cache(BlockDriverState *bs, #endif /* !__linux__ */ } +static void raw_account_discard(BDRVRawState *s, uint64_t nbytes, int ret) +{ + if (ret) { + s->stats.discard_nb_failed++; + } else { + s->stats.discard_nb_ok++; + s->stats.discard_bytes_ok += nbytes; + } +} + static coroutine_fn int raw_co_pdiscard(BlockDriverState *bs, int64_t offset, int bytes) { BDRVRawState *s = bs->opaque; + int ret; - return paio_submit_co(bs, s->fd, offset, NULL, bytes, QEMU_AIO_DISCARD); + ret = paio_submit_co(bs, s->fd, offset, NULL, bytes, QEMU_AIO_DISCARD); + raw_account_discard(s, bytes, ret); + return ret; } static int coroutine_fn raw_co_pwrite_zeroes( @@ -3077,10 +3095,14 @@ hdev_co_pdiscard(BlockDriverState *bs, int64_t offset, int bytes) ret = fd_open(bs); if (ret < 0) { + raw_account_discard(s, bytes, ret); return ret; } - return paio_submit_co(bs, s->fd, offset, NULL, bytes, - QEMU_AIO_DISCARD | QEMU_AIO_BLKDEV); + + ret = paio_submit_co(bs, s->fd, offset, NULL, bytes, + QEMU_AIO_DISCARD | QEMU_AIO_BLKDEV); + raw_account_discard(s, bytes, ret); + return ret; } static coroutine_fn int hdev_co_pwrite_zeroes(BlockDriverState *bs, -- 2.7.4