[PATCH 113/117] Staging: hv: util: Adjust guest time in a process context
From: "K. Y. Srinivasan" <kys@microsoft.com>
Date: 2011-07-15 17:30:22
Also in:
lkml
Subsystem:
staging subsystem, the rest · Maintainers:
Greg Kroah-Hartman, Linus Torvalds
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 <kys@microsoft.com> Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> --- drivers/staging/hv/hv_util.c | 30 ++++++++++++++++++++++++++++-- 1 files changed, 28 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/hv/hv_util.c b/drivers/staging/hv/hv_util.c
index 070e61f..d3fb017 100644
--- a/drivers/staging/hv/hv_util.c
+++ b/drivers/staging/hv/hv_util.c@@ -109,6 +109,24 @@ 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.
@@ -121,16 +139,24 @@ 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); } }
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1.7.4.1