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Message-ID: <20240822135018.1931258-11-kernel@pankajraghav.com>
Date: Thu, 22 Aug 2024 15:50:18 +0200
From: "Pankaj Raghav (Samsung)" <kernel@...kajraghav.com>
To: brauner@...nel.org,
akpm@...ux-foundation.org
Cc: chandan.babu@...cle.com,
linux-fsdevel@...r.kernel.org,
djwong@...nel.org,
hare@...e.de,
gost.dev@...sung.com,
linux-xfs@...r.kernel.org,
kernel@...kajraghav.com,
hch@....de,
david@...morbit.com,
Zi Yan <ziy@...dia.com>,
yang@...amperecomputing.com,
linux-kernel@...r.kernel.org,
linux-mm@...ck.org,
willy@...radead.org,
john.g.garry@...cle.com,
cl@...amperecomputing.com,
p.raghav@...sung.com,
mcgrof@...nel.org,
ryan.roberts@....com,
Dave Chinner <dchinner@...hat.com>
Subject: [PATCH v13 10/10] xfs: enable block size larger than page size support
From: Pankaj Raghav <p.raghav@...sung.com>
Page cache now has the ability to have a minimum order when allocating
a folio which is a prerequisite to add support for block size > page
size.
Signed-off-by: Pankaj Raghav <p.raghav@...sung.com>
Signed-off-by: Luis Chamberlain <mcgrof@...nel.org>
Reviewed-by: Darrick J. Wong <djwong@...nel.org>
Reviewed-by: Dave Chinner <dchinner@...hat.com>
---
fs/xfs/libxfs/xfs_ialloc.c | 5 +++++
fs/xfs/libxfs/xfs_shared.h | 3 +++
fs/xfs/xfs_icache.c | 6 ++++--
fs/xfs/xfs_mount.c | 1 -
fs/xfs/xfs_super.c | 28 ++++++++++++++++++++--------
include/linux/pagemap.h | 13 +++++++++++++
6 files changed, 45 insertions(+), 11 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_ialloc.c b/fs/xfs/libxfs/xfs_ialloc.c
index 0af5b7a33d055..1921b689888b8 100644
--- a/fs/xfs/libxfs/xfs_ialloc.c
+++ b/fs/xfs/libxfs/xfs_ialloc.c
@@ -3033,6 +3033,11 @@ xfs_ialloc_setup_geometry(
igeo->ialloc_align = mp->m_dalign;
else
igeo->ialloc_align = 0;
+
+ if (mp->m_sb.sb_blocksize > PAGE_SIZE)
+ igeo->min_folio_order = mp->m_sb.sb_blocklog - PAGE_SHIFT;
+ else
+ igeo->min_folio_order = 0;
}
/* Compute the location of the root directory inode that is laid out by mkfs. */
diff --git a/fs/xfs/libxfs/xfs_shared.h b/fs/xfs/libxfs/xfs_shared.h
index 2f7413afbf46c..33b84a3a83ff6 100644
--- a/fs/xfs/libxfs/xfs_shared.h
+++ b/fs/xfs/libxfs/xfs_shared.h
@@ -224,6 +224,9 @@ struct xfs_ino_geometry {
/* precomputed value for di_flags2 */
uint64_t new_diflags2;
+ /* minimum folio order of a page cache allocation */
+ unsigned int min_folio_order;
+
};
#endif /* __XFS_SHARED_H__ */
diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c
index cf629302d48e7..0fcf235e50235 100644
--- a/fs/xfs/xfs_icache.c
+++ b/fs/xfs/xfs_icache.c
@@ -88,7 +88,8 @@ xfs_inode_alloc(
/* VFS doesn't initialise i_mode! */
VFS_I(ip)->i_mode = 0;
- mapping_set_large_folios(VFS_I(ip)->i_mapping);
+ mapping_set_folio_min_order(VFS_I(ip)->i_mapping,
+ M_IGEO(mp)->min_folio_order);
XFS_STATS_INC(mp, vn_active);
ASSERT(atomic_read(&ip->i_pincount) == 0);
@@ -325,7 +326,8 @@ xfs_reinit_inode(
inode->i_uid = uid;
inode->i_gid = gid;
inode->i_state = state;
- mapping_set_large_folios(inode->i_mapping);
+ mapping_set_folio_min_order(inode->i_mapping,
+ M_IGEO(mp)->min_folio_order);
return error;
}
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index 3949f720b5354..c6933440f8066 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -134,7 +134,6 @@ xfs_sb_validate_fsb_count(
{
uint64_t max_bytes;
- ASSERT(PAGE_SHIFT >= sbp->sb_blocklog);
ASSERT(sbp->sb_blocklog >= BBSHIFT);
if (check_shl_overflow(nblocks, sbp->sb_blocklog, &max_bytes))
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 210481b03fdb4..8cd76a01b543f 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1638,16 +1638,28 @@ xfs_fs_fill_super(
goto out_free_sb;
}
- /*
- * Until this is fixed only page-sized or smaller data blocks work.
- */
if (mp->m_sb.sb_blocksize > PAGE_SIZE) {
- xfs_warn(mp,
- "File system with blocksize %d bytes. "
- "Only pagesize (%ld) or less will currently work.",
+ size_t max_folio_size = mapping_max_folio_size_supported();
+
+ if (!xfs_has_crc(mp)) {
+ xfs_warn(mp,
+"V4 Filesystem with blocksize %d bytes. Only pagesize (%ld) or less is supported.",
mp->m_sb.sb_blocksize, PAGE_SIZE);
- error = -ENOSYS;
- goto out_free_sb;
+ error = -ENOSYS;
+ goto out_free_sb;
+ }
+
+ if (mp->m_sb.sb_blocksize > max_folio_size) {
+ xfs_warn(mp,
+"block size (%u bytes) not supported; Only block size (%ld) or less is supported",
+ mp->m_sb.sb_blocksize, max_folio_size);
+ error = -ENOSYS;
+ goto out_free_sb;
+ }
+
+ xfs_warn(mp,
+"EXPERIMENTAL: V5 Filesystem with Large Block Size (%d bytes) enabled.",
+ mp->m_sb.sb_blocksize);
}
/* Ensure this filesystem fits in the page cache limits */
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 4cc170949e9c0..55b254d951da7 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -374,6 +374,19 @@ static inline void mapping_set_gfp_mask(struct address_space *m, gfp_t mask)
#define MAX_XAS_ORDER (XA_CHUNK_SHIFT * 2 - 1)
#define MAX_PAGECACHE_ORDER min(MAX_XAS_ORDER, PREFERRED_MAX_PAGECACHE_ORDER)
+/*
+ * mapping_max_folio_size_supported() - Check the max folio size supported
+ *
+ * The filesystem should call this function at mount time if there is a
+ * requirement on the folio mapping size in the page cache.
+ */
+static inline size_t mapping_max_folio_size_supported(void)
+{
+ if (IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE))
+ return 1U << (PAGE_SHIFT + MAX_PAGECACHE_ORDER);
+ return PAGE_SIZE;
+}
+
/*
* mapping_set_folio_order_range() - Set the orders supported by a file.
* @mapping: The address space of the file.
--
2.44.1
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