[Qemu-devel] [PATCH 3/3] Add workerthreads configuration option

[Matthias Brugger <matthias.bgg@gmail.com>]

This patch allows the definition which thread  pool will be used by
every block device. The defintion of the workerthreads option
allows this at the command line level.

At the moment only the thread pool implementation "pool" can be chosen.

Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
---
 blockdev.c      | 13 +++++++++++++
 qemu-options.hx |  2 +-
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/blockdev.c b/blockdev.c
index b260477..8b83611 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -388,6 +388,15 @@ static DriveInfo *blockdev_init(QDict *bs_opts,
     }
 #endif
 
+    if ((buf = qemu_opt_get(opts, "workerthreads")) != NULL) {
+        if (!strcmp(buf, "pool")) {
+            /* this is the default */
+        } else {
+            error_report("invalid workerthreads option");
+            return NULL;
+        }
+    }
+
     if ((buf = qemu_opt_get(opts, "format")) != NULL) {
         if (is_help_option(buf)) {
             error_printf("Supported formats:");
@@ -2269,6 +2278,10 @@ QemuOptsList qemu_common_drive_opts = {
             .type = QEMU_OPT_STRING,
             .help = "disk serial number",
         },{
+            .name = "workerthreads",
+            .type = QEMU_OPT_STRING,
+            .help = "type of worker threads (pool)",
+        },{
             .name = "rerror",
             .type = QEMU_OPT_STRING,
             .help = "read error action",
diff --git a/qemu-options.hx b/qemu-options.hx
index 5dc8b75..6f22242 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -408,7 +408,7 @@ DEF("drive", HAS_ARG, QEMU_OPTION_drive,
     "       [,cyls=c,heads=h,secs=s[,trans=t]][,snapshot=on|off]\n"
     "       [,cache=writethrough|writeback|none|directsync|unsafe][,format=f]\n"
     "       [,serial=s][,addr=A][,id=name][,aio=threads|native]\n"
-    "       [,readonly=on|off][,copy-on-read=on|off]\n"
+    "       [,workerthreads=pool][,readonly=on|off][,copy-on-read=on|off]\n"
     "       [[,bps=b]|[[,bps_rd=r][,bps_wr=w]]]\n"
     "       [[,iops=i]|[[,iops_rd=r][,iops_wr=w]]]\n"
     "       [[,bps_max=bm]|[[,bps_rd_max=rm][,bps_wr_max=wm]]]\n"
-- 
1.8.1.2