57921f916a
- Create getblkx(9) variant of getblk(9) which can return error. - Add GB_NOSPARSE flag for getblk()/getblkx() which requests that BMAP was performed before the buffer is created, and EJUSTRETURN returned in case the requested block does not exist. - Make ffs_read() use GB_NOSPARSE to avoid instantiating buffer (and allocating the pages for it), copying from zero_region instead. The end result is less page allocations and buffer recycling when a hole is read, which is important for some benchmarks. Requested and reviewed by: jeff Tested by: pho Sponsored by: The FreeBSD Foundation MFC after: 2 weeks Differential revision: https://reviews.freebsd.org/D14917 |
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| .. | ||
| ffs_alloc.c | ||
| ffs_balloc.c | ||
| ffs_extern.h | ||
| ffs_inode.c | ||
| ffs_rawread.c | ||
| ffs_snapshot.c | ||
| ffs_softdep.c | ||
| ffs_subr.c | ||
| ffs_suspend.c | ||
| ffs_tables.c | ||
| ffs_vfsops.c | ||
| ffs_vnops.c | ||
| fs.h | ||
| softdep.h | ||