From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lukas Czerner Subject: [PATCH V2] mke2fs: Inform user of ongoing discard Date: Mon, 24 Jan 2011 20:52:00 +0100 Message-ID: <1295898720-2221-1-git-send-email-lczerner@redhat.com> Cc: tytso@mit.edu, lczerner@redhat.com To: linux-ext4@vger.kernel.org Return-path: Received: from mx1.redhat.com ([209.132.183.28]:61638 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750735Ab1AXTwH (ORCPT ); Mon, 24 Jan 2011 14:52:07 -0500 Sender: linux-ext4-owner@vger.kernel.org List-ID: (V2: remove MB macro) For some time now we are doing initial discard of the device prior to filesystem creation. However, there is no feedback for the user and hence on some devices with slow TRIM implementation it may appear that mke2fs is stuck. This commit introduce new function mke2fs_discard_device(), which is a wrapper for io_channel_discard(). The discard is done per-partes and discard progress is being reported back to the user. The discard step has been set to 2GB size, which works reasonably well on both slow and fast devices. I gave up on doing fancy things like align discard according to discard_alignment, checking for discard granularity and computing estimate time. First of all, because it would require either new ioctl to retrieve those information or use of libudev library, none of it seems to be worth it. Regarding discard_granularity, I doubt there is any sane device with discard granularity that big it would affect this. Signed-off-by: Lukas Czerner --- misc/mke2fs.c | 54 +++++++++++++++++++++++++++++++++++++++++------------- 1 files changed, 41 insertions(+), 13 deletions(-) diff --git a/misc/mke2fs.c b/misc/mke2fs.c index bc1211d..8f358c6 100644 --- a/misc/mke2fs.c +++ b/misc/mke2fs.c @@ -72,6 +72,8 @@ extern int optind; #define ZAP_BOOTBLOCK #endif +#define DISCARD_STEP_MB (2048) + extern int isatty(int); extern FILE *fpopen(const char *cmd, const char *mode); @@ -1922,6 +1924,44 @@ static int mke2fs_setup_tdb(const char *name, io_manager *io_ptr) return retval; } +static int mke2fs_discard_device(ext2_filsys fs) +{ + struct ext2fs_numeric_progress_struct progress; + blk64_t blocks = ext2fs_blocks_count(fs->super); + blk64_t count = DISCARD_STEP_MB; + blk64_t cur = 0; + int retval = 0; + + count *= (1024 * 1024); + count /= fs->blocksize; + + ext2fs_numeric_progress_init(fs, &progress, + _("Discarding device blocks: "), + blocks); + while (cur < blocks) { + ext2fs_numeric_progress_update(fs, &progress, cur); + + if (cur + count > blocks) + count = blocks - cur; + + retval = io_channel_discard(fs->io, cur, count, fs->blocksize); + if (retval) + break; + cur += count; + } + + if (retval) { + ext2fs_numeric_progress_close(fs, &progress, + _("failed - ")); + if (!quiet) + printf("%s\n",error_message(retval)); + } else + ext2fs_numeric_progress_close(fs, &progress, + _("done \n")); + + return retval; +} + int main (int argc, char *argv[]) { errcode_t retval = 0; @@ -1982,19 +2022,7 @@ int main (int argc, char *argv[]) /* Can't undo discard ... */ if (discard && (io_ptr != undo_io_manager)) { - blk64_t blocks = ext2fs_blocks_count(fs->super); - if (verbose) - printf(_("Calling BLKDISCARD from 0 to %llu... "), - (unsigned long long) blocks); - retval = io_channel_discard(fs->io, 0, blocks, fs->blocksize); - if (verbose) { - if (retval) - printf(_("failed (%s)\n"), - error_message(retval)); - else - printf(_("succeeded\n")); - }