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metadata: avoid excessive check of /etc/localtime

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With larger metadata, decoding 'localtime()' for hinting time creation
of every LV may cause excessive check of /etc/localtime file.
Set TZ to ":/etc/localtime" so glibc reads this file just once
instead of check everytime if there has anything changed.
This commit is contained in:
Zdenek Kabelac 2021-09-27 15:52:41 +02:00
parent 61a6f9905e
commit 3a3aabb832
1 changed files with 5 additions and 0 deletions
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5
tools/lvmcmdline.c
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@ -3043,6 +3043,11 @@ int lvm_run_command(struct cmd_context *cmd, int argc, char **argv)
int skip_hyphens; int skip_hyphens;
int refresh_done = 0; int refresh_done = 0;
/* Avoid excessive access to /etc/localtime and set TZ variable for glibc
* so it does not need to check /etc/localtime everytime that needs that info */
if (!getenv("TZ"))
setenv("TZ", ":/etc/localtime", 0);
init_error_message_produced(0); init_error_message_produced(0);
/* each command should start out with sigint flag cleared */ /* each command should start out with sigint flag cleared */