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virtiofsd: add --rlimit-nofile=NUM option

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Make it possible to specify the RLIMIT_NOFILE on the command-line.
Users running multiple virtiofsd processes should allocate a certain
number to each process so that the system-wide limit can never be
exhausted.

When this option is set to 0 the rlimit is left at its current value.
This is useful when a management tool wants to configure the rlimit
itself.

The default behavior remains unchanged: try to set the limit to
1,000,000 file descriptors if the current rlimit is lower.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20200501140644.220940-2-stefanha@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2020-05-01 15:06:43 +01:00 • committed by Dr. David Alan Gilbert
parent 1c47613588
commit 6dbb716877
3 changed files with 32 additions and 14 deletions
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1
tools/virtiofsd/fuse_lowlevel.h
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@ -1777,6 +1777,7 @@ struct fuse_cmdline_opts {
int syslog;
int log_level;
unsigned int max_idle_threads;
unsigned long rlimit_nofile;
};
/**