From e09356fa05ff174ed02ade8ea8e4ab98effa0ccd Mon Sep 17 00:00:00 2001 From: Alexander Motin Date: Wed, 6 Dec 2023 18:37:27 -0500 Subject: [PATCH] BRT: Limit brt_vdev_dump() to only one vdev Without this patch on pool of 60 vdevs with ZFS_DEBUG enabled clone takes much more time than copy, while heavily trashing dbgmsg for no good reason, repeatedly dumping all vdevs BRTs again and again, even unmodified ones. I am generally not sure this dumping is not excessive, but decided to keep it for now, just restricting its scope to more reasonable. Reviewed-by: Kay Pedersen Reviewed-by: Brian Behlendorf Signed-off-by: Alexander Motin Sponsored by: iXsystems, Inc. Closes #15625 --- module/zfs/brt.c | 80 ++++++++++++++++++++---------------------------- 1 file changed, 33 insertions(+), 47 deletions(-) diff --git a/module/zfs/brt.c b/module/zfs/brt.c index a701c70fcf..225ddaca1e 100644 --- a/module/zfs/brt.c +++ b/module/zfs/brt.c @@ -342,7 +342,7 @@ brt_vdev_entcount_get(const brt_vdev_t *brtvd, uint64_t idx) ASSERT3U(idx, <, brtvd->bv_size); - if (brtvd->bv_need_byteswap) { + if (unlikely(brtvd->bv_need_byteswap)) { return (BSWAP_16(brtvd->bv_entcount[idx])); } else { return (brtvd->bv_entcount[idx]); @@ -355,7 +355,7 @@ brt_vdev_entcount_set(brt_vdev_t *brtvd, uint64_t idx, uint16_t entcnt) ASSERT3U(idx, <, brtvd->bv_size); - if (brtvd->bv_need_byteswap) { + if (unlikely(brtvd->bv_need_byteswap)) { brtvd->bv_entcount[idx] = BSWAP_16(entcnt); } else { brtvd->bv_entcount[idx] = entcnt; @@ -390,55 +390,39 @@ brt_vdev_entcount_dec(brt_vdev_t *brtvd, uint64_t idx) #ifdef ZFS_DEBUG static void -brt_vdev_dump(brt_t *brt) +brt_vdev_dump(brt_vdev_t *brtvd) { - brt_vdev_t *brtvd; - uint64_t vdevid; + uint64_t idx; - if ((zfs_flags & ZFS_DEBUG_BRT) == 0) { - return; - } - - if (brt->brt_nvdevs == 0) { - zfs_dbgmsg("BRT empty"); - return; - } - - zfs_dbgmsg("BRT vdev dump:"); - for (vdevid = 0; vdevid < brt->brt_nvdevs; vdevid++) { - uint64_t idx; - - brtvd = &brt->brt_vdevs[vdevid]; - zfs_dbgmsg(" vdevid=%llu/%llu meta_dirty=%d entcount_dirty=%d " - "size=%llu totalcount=%llu nblocks=%llu bitmapsize=%zu\n", - (u_longlong_t)vdevid, (u_longlong_t)brtvd->bv_vdevid, - brtvd->bv_meta_dirty, brtvd->bv_entcount_dirty, - (u_longlong_t)brtvd->bv_size, - (u_longlong_t)brtvd->bv_totalcount, - (u_longlong_t)brtvd->bv_nblocks, - (size_t)BT_SIZEOFMAP(brtvd->bv_nblocks)); - if (brtvd->bv_totalcount > 0) { - zfs_dbgmsg(" entcounts:"); - for (idx = 0; idx < brtvd->bv_size; idx++) { - if (brt_vdev_entcount_get(brtvd, idx) > 0) { - zfs_dbgmsg(" [%04llu] %hu", - (u_longlong_t)idx, - brt_vdev_entcount_get(brtvd, idx)); - } + zfs_dbgmsg(" BRT vdevid=%llu meta_dirty=%d entcount_dirty=%d " + "size=%llu totalcount=%llu nblocks=%llu bitmapsize=%zu\n", + (u_longlong_t)brtvd->bv_vdevid, + brtvd->bv_meta_dirty, brtvd->bv_entcount_dirty, + (u_longlong_t)brtvd->bv_size, + (u_longlong_t)brtvd->bv_totalcount, + (u_longlong_t)brtvd->bv_nblocks, + (size_t)BT_SIZEOFMAP(brtvd->bv_nblocks)); + if (brtvd->bv_totalcount > 0) { + zfs_dbgmsg(" entcounts:"); + for (idx = 0; idx < brtvd->bv_size; idx++) { + uint16_t entcnt = brt_vdev_entcount_get(brtvd, idx); + if (entcnt > 0) { + zfs_dbgmsg(" [%04llu] %hu", + (u_longlong_t)idx, entcnt); } } - if (brtvd->bv_entcount_dirty) { - char *bitmap; + } + if (brtvd->bv_entcount_dirty) { + char *bitmap; - bitmap = kmem_alloc(brtvd->bv_nblocks + 1, KM_SLEEP); - for (idx = 0; idx < brtvd->bv_nblocks; idx++) { - bitmap[idx] = - BT_TEST(brtvd->bv_bitmap, idx) ? 'x' : '.'; - } - bitmap[idx] = '\0'; - zfs_dbgmsg(" bitmap: %s", bitmap); - kmem_free(bitmap, brtvd->bv_nblocks + 1); + bitmap = kmem_alloc(brtvd->bv_nblocks + 1, KM_SLEEP); + for (idx = 0; idx < brtvd->bv_nblocks; idx++) { + bitmap[idx] = + BT_TEST(brtvd->bv_bitmap, idx) ? 'x' : '.'; } + bitmap[idx] = '\0'; + zfs_dbgmsg(" dirty: %s", bitmap); + kmem_free(bitmap, brtvd->bv_nblocks + 1); } } #endif @@ -767,7 +751,8 @@ brt_vdev_addref(brt_t *brt, brt_vdev_t *brtvd, const brt_entry_t *bre, BT_SET(brtvd->bv_bitmap, idx); #ifdef ZFS_DEBUG - brt_vdev_dump(brt); + if (zfs_flags & ZFS_DEBUG_BRT) + brt_vdev_dump(brtvd); #endif } @@ -803,7 +788,8 @@ brt_vdev_decref(brt_t *brt, brt_vdev_t *brtvd, const brt_entry_t *bre, BT_SET(brtvd->bv_bitmap, idx); #ifdef ZFS_DEBUG - brt_vdev_dump(brt); + if (zfs_flags & ZFS_DEBUG_BRT) + brt_vdev_dump(brtvd); #endif }