diff options
| author | Pavel Reichl <preichl@redhat.com> | 2019-12-13 16:21:26 -0500 |
|---|---|---|
| committer | Eric Sandeen <sandeen@redhat.com> | 2019-12-13 16:21:26 -0500 |
| commit | 7e8a6edb4d1ba0079152eb477abbbc1dfb1ebb7e (patch) | |
| tree | 131b7e4d3c96fea89bd2a6663ff9dd8c86618668 | |
| parent | 3f153e051abccce0c120ade5c08a675a50cecee9 (diff) | |
| download | xfsprogs-dev-7e8a6edb4d1ba0079152eb477abbbc1dfb1ebb7e.tar.gz | |
mkfs: Break block discard into chunks of 2 GB
Some users are not happy about the BLKDISCARD taking too long and at the
same time not being informed about that - so they think that the command
actually hung.
This commit changes code so that progress reporting is possible and also
typing the ^C will cancel the ongoing BLKDISCARD.
Signed-off-by: Pavel Reichl <preichl@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
| -rw-r--r-- | mkfs/xfs_mkfs.c | 50 |
1 files changed, 37 insertions, 13 deletions
diff --git a/mkfs/xfs_mkfs.c b/mkfs/xfs_mkfs.c index 18338a6147..4bfdebf6f3 100644 --- a/mkfs/xfs_mkfs.c +++ b/mkfs/xfs_mkfs.c @@ -1240,17 +1240,40 @@ done: } static void -discard_blocks(dev_t dev, uint64_t nsectors) +discard_blocks(dev_t dev, uint64_t nsectors, int quiet) { - int fd; + int fd; + uint64_t offset = 0; + /* Discard the device 2G at a time */ + const uint64_t step = 2ULL << 30; + const uint64_t count = BBTOB(nsectors); - /* - * We intentionally ignore errors from the discard ioctl. It is - * not necessary for the mkfs functionality but just an optimization. - */ fd = libxfs_device_to_fd(dev); - if (fd > 0) - platform_discard_blocks(fd, 0, nsectors << 9); + if (fd <= 0) + return; + if (!quiet) { + printf("Discarding blocks..."); + fflush(stdout); + } + + /* The block discarding happens in smaller batches so it can be + * interrupted prematurely + */ + while (offset < count) { + uint64_t tmp_step = min(step, count - offset); + + /* + * We intentionally ignore errors from the discard ioctl. It is + * not necessary for the mkfs functionality but just an + * optimization. However we should stop on error. + */ + if (platform_discard_blocks(fd, offset, tmp_step)) + return; + + offset += tmp_step; + } + if (!quiet) + printf("Done.\n"); } static __attribute__((noreturn)) void @@ -2507,18 +2530,19 @@ open_devices( static void discard_devices( - struct libxfs_xinit *xi) + struct libxfs_xinit *xi, + int quiet) { /* * This function has to be called after libxfs has been initialized. */ if (!xi->disfile) - discard_blocks(xi->ddev, xi->dsize); + discard_blocks(xi->ddev, xi->dsize, quiet); if (xi->rtdev && !xi->risfile) - discard_blocks(xi->rtdev, xi->rtsize); + discard_blocks(xi->rtdev, xi->rtsize, quiet); if (xi->logdev && xi->logdev != xi->ddev && !xi->lisfile) - discard_blocks(xi->logdev, xi->logBBsize); + discard_blocks(xi->logdev, xi->logBBsize, quiet); } static void @@ -3749,7 +3773,7 @@ main( * All values have been validated, discard the old device layout. */ if (discard && !dry_run) - discard_devices(&xi); + discard_devices(&xi, quiet); /* * we need the libxfs buffer cache from here on in. |