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| author | Zhihao Cheng <chengzhihao1@huawei.com> | 2023-08-28 14:38:36 +0800 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2023-10-28 22:33:39 +0200 |
| commit | a033ab4fec5fd9194d1b6c0306efbdc75f70b142 (patch) | |
| tree | bf72672f43d669910ad7b88ba5db6722227b7c67 /drivers/mtd | |
| parent | 08a4267874164b2e9c8c50831acd466f47208acc (diff) | |
| download | lwn-a033ab4fec5fd9194d1b6c0306efbdc75f70b142.tar.gz lwn-a033ab4fec5fd9194d1b6c0306efbdc75f70b142.zip | |
ubi: fastmap: Allocate memory with GFP_NOFS in ubi_update_fastmap
Function ubi_update_fastmap could be called in IO context, for example:
ubifs_writepage
do_writepage
ubifs_jnl_write_data
write_head
ubifs_wbuf_write_nolock
ubifs_leb_write
ubi_leb_write
ubi_eba_write_leb
try_write_vid_and_data
ubi_wl_get_peb
ubi_update_fastmap
erase_block
So it's better to allocate memory with GFP_NOFS mode, in case waiting
page writeback(dead loop).
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/ubi/fastmap.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/mtd/ubi/fastmap.c b/drivers/mtd/ubi/fastmap.c index 05ecdc049343..d64bfb986d40 100644 --- a/drivers/mtd/ubi/fastmap.c +++ b/drivers/mtd/ubi/fastmap.c @@ -20,7 +20,7 @@ static inline unsigned long *init_seen(struct ubi_device *ubi) if (!ubi_dbg_chk_fastmap(ubi)) return NULL; - ret = bitmap_zalloc(ubi->peb_count, GFP_KERNEL); + ret = bitmap_zalloc(ubi->peb_count, GFP_NOFS); if (!ret) return ERR_PTR(-ENOMEM); @@ -105,7 +105,7 @@ static struct ubi_vid_io_buf *new_fm_vbuf(struct ubi_device *ubi, int vol_id) struct ubi_vid_io_buf *new; struct ubi_vid_hdr *vh; - new = ubi_alloc_vid_buf(ubi, GFP_KERNEL); + new = ubi_alloc_vid_buf(ubi, GFP_NOFS); if (!new) goto out; @@ -1403,7 +1403,7 @@ static int erase_block(struct ubi_device *ubi, struct ubi_wl_entry *e) struct ubi_ec_hdr *ec_hdr; long long ec = e->ec; - ec_hdr = kzalloc(ubi->ec_hdr_alsize, GFP_KERNEL); + ec_hdr = kzalloc(ubi->ec_hdr_alsize, GFP_NOFS); if (!ec_hdr) return -ENOMEM; @@ -1459,7 +1459,7 @@ static int invalidate_fastmap(struct ubi_device *ubi) ubi->fm = NULL; ret = -ENOMEM; - fm = kzalloc(sizeof(*fm), GFP_KERNEL); + fm = kzalloc(sizeof(*fm), GFP_NOFS); if (!fm) goto out; @@ -1548,7 +1548,7 @@ int ubi_update_fastmap(struct ubi_device *ubi) return 0; } - new_fm = kzalloc(sizeof(*new_fm), GFP_KERNEL); + new_fm = kzalloc(sizeof(*new_fm), GFP_NOFS); if (!new_fm) { up_write(&ubi->fm_eba_sem); up_write(&ubi->work_sem); |