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Allow setting of scheduling priority

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This commit is contained in:
Antonio SJ Musumeci 2023-01-25 23:38:31 -05:00
parent ec5ac0c517
commit a7113bb163
4 changed files with 12 additions and 6 deletions
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5
README.md
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@ -1,6 +1,6 @@
% mergerfs(1) mergerfs user manual
% Antonio SJ Musumeci <trapexit@spawn.link>
% 2023-01-24
% 2023-01-25
# NAME
@ -203,6 +203,9 @@ These options are the same regardless of whether you use them with the `mergerfs
`read-thread-count` refers to the number of threads reading FUSE
messages which are dispatched to process threads. -1 means disabled
otherwise acts like `read-thread-count`. (default: -1)
* **scheduling-priority=INT**: Set mergerfs' scheduling
priority. Valid values range from -20 to 19. See `setpriority` man
page for more details. (default: -10)
* **fsname=STR**: Sets the name of the filesystem as seen in
**mount**, **df**, etc. Defaults to a list of the source paths
concatenated together with the longest common prefix removed.

3
src/config.cpp
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@ -64,6 +64,7 @@ namespace l
IFERT("readdirplus");
IFERT("threads");
IFERT("version");
IFERT("scheduling-priority");
return false;
}
@ -103,6 +104,7 @@ Config::Config()
readdir(ReadDir::ENUM::POSIX),
readdirplus(false),
rename_exdev(RenameEXDEV::ENUM::PASSTHROUGH),
scheduling_priority(-10),
security_capability(true),
srcmounts(branches),
statfs(StatFS::ENUM::BASE),
@ -171,6 +173,7 @@ Config::Config()
// _map["readdir"] = &readdir;
_map["readdirplus"] = &readdirplus;
_map["rename-exdev"] = &rename_exdev;
_map["scheduling-priority"] = &scheduling_priority;
_map["security_capability"] = &security_capability;
_map["srcmounts"] = &srcmounts;
_map["statfs"] = &statfs;

2
src/config.hpp
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@ -133,6 +133,7 @@ public:
ReadDir readdir;
ConfigBOOL readdirplus;
RenameEXDEV rename_exdev;
ConfigINT scheduling_priority;
ConfigBOOL security_capability;
SrcMounts srcmounts;
StatFS statfs;
@ -145,6 +146,7 @@ public:
ConfigBOOL writeback_cache;
XAttr xattr;
public:
friend std::ostream& operator<<(std::ostream &s,
const Config &c);

8
src/mergerfs.cpp
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@ -139,15 +139,13 @@ namespace l
static
void
setup_resources(void)
setup_resources(const int scheduling_priority_)
{
const int prio = -10;
std::srand(time(NULL));
resources::reset_umask();
resources::maxout_rlimit_nofile();
resources::maxout_rlimit_fsize();
resources::setpriority(prio);
resources::setpriority(scheduling_priority_);
}
static
@ -204,7 +202,7 @@ namespace l
if(cfg->branches_mount_timeout > 0)
l::wait_for_mount(cfg);
l::setup_resources();
l::setup_resources(cfg->scheduling_priority);
l::get_fuse_operations(ops,cfg->nullrw);
return fuse_main(args.argc,