From mboxrd@z Thu Jan 1 00:00:00 1970 From: "K. Y. Srinivasan" Subject: [PATCH 32/46] Staging: hv: util: Adjust guest time in a process context Date: Sat, 27 Aug 2011 11:31:31 -0700 Message-ID: <1314469905-7058-32-git-send-email-kys@microsoft.com> References: <1314469874-7017-1-git-send-email-kys@microsoft.com> <1314469905-7058-1-git-send-email-kys@microsoft.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1314469905-7058-1-git-send-email-kys@microsoft.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: devel-bounces@linuxdriverproject.org Sender: devel-bounces@linuxdriverproject.org To: gregkh@suse.de, linux-kernel@vger.kernel.org, devel@linuxdriverproject.org, virtualization@lists.osdl.org Cc: Haiyang Zhang List-Id: virtualization@lists.linuxfoundation.org The current code was adjusting guest time in interrupt context; do this in process context since we may have to initiate cross-processor interrupts as part of setting time. Signed-off-by: K. Y. Srinivasan Signed-off-by: Haiyang Zhang --- drivers/staging/hv/hv_util.c | 33 ++++++++++++++++++++++++++++++--- 1 files changed, 30 insertions(+), 3 deletions(-) diff --git a/drivers/staging/hv/hv_util.c b/drivers/staging/hv/hv_util.c index 876d44a..e29a2a2 100644 --- a/drivers/staging/hv/hv_util.c +++ b/drivers/staging/hv/hv_util.c @@ -107,6 +107,24 @@ static inline void do_adj_guesttime(u64 hosttime) } /* + * Set the host time in a process context. + */ + +struct adj_time_work { + struct work_struct work; + u64 host_time; +}; + +static void hv_set_host_time(struct work_struct *work) +{ + struct adj_time_work *wrk; + + wrk = container_of(work, struct adj_time_work, work); + do_adj_guesttime(wrk->host_time); + kfree(wrk); +} + +/* * Synchronize time with host after reboot, restore, etc. * * ICTIMESYNCFLAG_SYNC flag bit indicates reboot, restore events of the VM. @@ -119,17 +137,26 @@ static inline void do_adj_guesttime(u64 hosttime) */ static inline void adj_guesttime(u64 hosttime, u8 flags) { + struct adj_time_work *wrk; static s32 scnt = 50; + wrk = kmalloc(sizeof(struct adj_time_work), GFP_ATOMIC); + if (wrk == NULL) + return; + + wrk->host_time = hosttime; if ((flags & ICTIMESYNCFLAG_SYNC) != 0) { - do_adj_guesttime(hosttime); + INIT_WORK(&wrk->work, hv_set_host_time); + schedule_work(&wrk->work); return; } if ((flags & ICTIMESYNCFLAG_SAMPLE) != 0 && scnt > 0) { scnt--; - do_adj_guesttime(hosttime); - } + INIT_WORK(&wrk->work, hv_set_host_time); + schedule_work(&wrk->work); + } else + kfree(wrk); } /* -- 1.7.4.1