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Report time spent in posix_fallocate() as a wait event.

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When allocating DSM segments with posix_fallocate() on Linux (see commit
899bd785), report this activity as a wait event exactly as we would if
we were using file-backed DSM rather than shm_open()-backed DSM.

Author: Thomas Munro
Discussion: https://postgr.es/m/CA%2BhUKGKCSh4GARZrJrQZwqs5SYp0xDMRr9Bvb%2BHQzJKvRgL6ZA%40mail.gmail.com
This commit is contained in:
Thomas Munro 2020-01-31 17:21:47 +13:00
parent d061ea21fc
commit ef02fb15a3
1 changed files with 2 additions and 0 deletions
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2
src/backend/storage/ipc/dsm_impl.c
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@ -371,10 +371,12 @@ dsm_impl_posix_resize(int fd, off_t size)
* interrupt pending. This avoids the possibility of looping forever
* if another backend is repeatedly trying to interrupt us.
*/
pgstat_report_wait_start(WAIT_EVENT_DSM_FILL_ZERO_WRITE);
do
{
rc = posix_fallocate(fd, 0, size);
} while (rc == EINTR && !(ProcDiePending || QueryCancelPending));
pgstat_report_wait_end();
/*
* The caller expects errno to be set, but posix_fallocate() doesn't