github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-02 03:24:19 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

fs/netfs: reorder struct fields to eliminate holes

Browse Source 
This shrinks `struct netfs_io_stream` from 104 to 96 bytes and `struct
netfs_io_request` from 600 to 576 bytes.

[DH: Modified as the patch to turn netfs_io_request::error into a short
was removed from the set]

Signed-off-by: Max Kellermann <max.kellermann@ionos.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/20250519134813.2975312-7-dhowells@redhat.com
cc: Paulo Alcantara <pc@manguebit.com>
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Max Kellermann 2025-05-19 14:48:02 +01:00 committed by Christian Brauner
parent d46a7b217d
commit 314ee7035f
No known key found for this signature in database
GPG Key ID: 91C61BC06578DCA2
1 changed files with 10 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
include/linux/netfs.h
View File

@ -144,8 +144,8 @@ struct netfs_io_stream {
struct netfs_io_subrequest *front; /* Op being collected */
unsigned long long collected_to; /* Position we've collected results to */
size_t transferred; /* The amount transferred from this stream */
enum netfs_io_source source; /* Where to read from/write to */
unsigned short error; /* Aggregate error for the stream */
enum netfs_io_source source; /* Where to read from/write to */
unsigned char stream_nr; /* Index of stream in parent table */
bool avail; /* T if stream is available */
bool active; /* T if stream is active */
@ -240,19 +240,10 @@ struct netfs_io_request {
void *netfs_priv; /* Private data for the netfs */
void *netfs_priv2; /* Private data for the netfs */
struct bio_vec *direct_bv; /* DIO buffer list (when handling iovec-iter) */
unsigned int direct_bv_count; /* Number of elements in direct_bv[] */
unsigned int debug_id;
unsigned int rsize; /* Maximum read size (0 for none) */
unsigned int wsize; /* Maximum write size (0 for none) */
atomic_t subreq_counter; /* Next subreq->debug_index */
unsigned int nr_group_rel; /* Number of refs to release on ->group */
spinlock_t lock; /* Lock for queuing subreqs */
unsigned long long submitted; /* Amount submitted for I/O so far */
unsigned long long len; /* Length of the request */
size_t transferred; /* Amount to be indicated as transferred */
long error; /* 0 or error that occurred */
enum netfs_io_origin origin; /* Origin of the request */
bool direct_bv_unpin; /* T if direct_bv[] must be unpinned */
unsigned long long i_size; /* Size of the file */
unsigned long long start; /* Start position */
atomic64_t issued_to; /* Write issuer folio cursor */
@ -260,7 +251,16 @@ struct netfs_io_request {
unsigned long long cleaned_to; /* Position we've cleaned folios to */
unsigned long long abandon_to; /* Position to abandon folios to */
pgoff_t no_unlock_folio; /* Don't unlock this folio after read */
unsigned int direct_bv_count; /* Number of elements in direct_bv[] */
unsigned int debug_id;
unsigned int rsize; /* Maximum read size (0 for none) */
unsigned int wsize; /* Maximum write size (0 for none) */
atomic_t subreq_counter; /* Next subreq->debug_index */
unsigned int nr_group_rel; /* Number of refs to release on ->group */
spinlock_t lock; /* Lock for queuing subreqs */
unsigned char front_folio_order; /* Order (size) of front folio */
enum netfs_io_origin origin; /* Origin of the request */
bool direct_bv_unpin; /* T if direct_bv[] must be unpinned */
refcount_t ref;
unsigned long flags;
#define NETFS_RREQ_OFFLOAD_COLLECTION 0 /* Offload collection to workqueue */