AcoSail/kernel_optimize_test
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xfs: Remove kmem_zone_alloc() usage

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Use kmem_cache_alloc() directly.

All kmem_zone_alloc() users pass 0 as flags, which are translated into:
GFP_KERNEL | __GFP_NOWARN, and kmem_zone_alloc() loops forever until the
allocation succeeds.

We can use __GFP_NOFAIL to tell the allocator to loop forever rather
than doing it ourself, and because the allocation will never fail, we do
not need to use __GFP_NOWARN anymore. Hence, all callers can be
converted to use GFP_KERNEL | __GFP_NOFAIL

Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
[darrick: add a comment back in about nofail]
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
This commit is contained in:
Carlos Maiolino 2020-07-22 09:23:04 -07:00 committed by Darrick J. Wong
parent 26270c9f4c
commit 3050bd0bfe
3 changed files with 8 additions and 8 deletions
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3
fs/xfs/libxfs/xfs_alloc.c
View File

@ -2462,7 +2462,8 @@ xfs_defer_agfl_block(
ASSERT(xfs_bmap_free_item_zone != NULL);
ASSERT(oinfo != NULL);
new = kmem_zone_alloc(xfs_bmap_free_item_zone, 0);
new = kmem_cache_alloc(xfs_bmap_free_item_zone,
GFP_KERNEL | __GFP_NOFAIL);
new->xefi_startblock = XFS_AGB_TO_FSB(mp, agno, agbno);
new->xefi_blockcount = 1;
new->xefi_oinfo = *oinfo;

3
fs/xfs/libxfs/xfs_bmap.c
View File

@ -553,7 +553,8 @@ __xfs_bmap_add_free(
#endif
ASSERT(xfs_bmap_free_item_zone != NULL);
new = kmem_zone_alloc(xfs_bmap_free_item_zone, 0);
new = kmem_cache_alloc(xfs_bmap_free_item_zone,
GFP_KERNEL | __GFP_NOFAIL);
new->xefi_startblock = bno;
new->xefi_blockcount = (xfs_extlen_t)len;
if (oinfo)

10
fs/xfs/xfs_icache.c
View File

@ -37,13 +37,11 @@ xfs_inode_alloc(
struct xfs_inode *ip;
/*
* if this didn't occur in transactions, we could use
* KM_MAYFAIL and return NULL here on ENOMEM. Set the
* code up to do this anyway.
* XXX: If this didn't occur in transactions, we could drop GFP_NOFAIL
* and return NULL here on ENOMEM.
*/
ip = kmem_zone_alloc(xfs_inode_zone, 0);
if (!ip)
return NULL;
ip = kmem_cache_alloc(xfs_inode_zone, GFP_KERNEL | __GFP_NOFAIL);
if (inode_init_always(mp->m_super, VFS_I(ip))) {
kmem_cache_free(xfs_inode_zone, ip);
return NULL;