Date: Mon, 16 Dec 2019 18:16:44 +0000 (UTC) From: Warner Losh <imp@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r355813 - in head/sys/cam: ata scsi Message-ID: <201912161816.xBGIGijv078938@repo.freebsd.org>
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Author: imp Date: Mon Dec 16 18:16:44 2019 New Revision: 355813 URL: https://svnweb.freebsd.org/changeset/base/355813 Log: Implement a system-wide limit or da and ada devices for delete. Excesively large TRIMs can result in timeouts, which cause big problems. Limit trims to 1GB to mititgate these issues. Reviewed by: scottl Differential Revision: https://reviews.freebsd.org/D22809 Modified: head/sys/cam/ata/ata_da.c head/sys/cam/scsi/scsi_da.c Modified: head/sys/cam/ata/ata_da.c ============================================================================== --- head/sys/cam/ata/ata_da.c Mon Dec 16 18:05:28 2019 (r355812) +++ head/sys/cam/ata/ata_da.c Mon Dec 16 18:16:44 2019 (r355813) @@ -858,6 +858,10 @@ static void adaresume(void *arg); #define ADA_DEFAULT_WRITE_CACHE 1 #endif +#ifndef ADA_DEFAULT_MAX_DELETE +#define ADA_DEFAULT_MAX_DELETE (1 * 1024 * 1024 * 1024) /* 1GB max trim by default */ +#endif + #define ADA_RA (softc->read_ahead >= 0 ? \ softc->read_ahead : ada_read_ahead) #define ADA_WC (softc->write_cache >= 0 ? \ @@ -878,6 +882,7 @@ static int ada_spindown_shutdown = ADA_DEFAULT_SPINDOW static int ada_spindown_suspend = ADA_DEFAULT_SPINDOWN_SUSPEND; static int ada_read_ahead = ADA_DEFAULT_READ_AHEAD; static int ada_write_cache = ADA_DEFAULT_WRITE_CACHE; +static int64_t ada_default_max_delete = ADA_DEFAULT_MAX_DELETE; static SYSCTL_NODE(_kern_cam, OID_AUTO, ada, CTLFLAG_RD, 0, "CAM Direct Access Disk driver"); @@ -895,6 +900,9 @@ SYSCTL_INT(_kern_cam_ada, OID_AUTO, read_ahead, CTLFLA &ada_read_ahead, 0, "Enable disk read-ahead"); SYSCTL_INT(_kern_cam_ada, OID_AUTO, write_cache, CTLFLAG_RWTUN, &ada_write_cache, 0, "Enable disk write cache"); +SYSCTL_QUAD(_kern_cam_ada, OID_AUTO, default_max_delete, CTLFLAG_RWTUN, + &ada_default_max_delete, 0, + "Default system wide maximum delete"); /* * ADA_ORDEREDTAG_INTERVAL determines how often, relative @@ -3392,6 +3400,8 @@ adasetgeom(struct ada_softc *softc, struct ccb_getdev softc->disk->d_delmaxsize = 256 * softc->params.secsize; } else softc->disk->d_delmaxsize = maxio; + if (softc->disk->d_delmaxsize > ada_default_max_delete) + softc->disk->d_delmaxsize = ada_default_max_delete; if ((softc->cpi.hba_misc & PIM_UNMAPPED) != 0) { d_flags |= DISKFLAG_UNMAPPED_BIO; softc->unmappedio = 1; Modified: head/sys/cam/scsi/scsi_da.c ============================================================================== --- head/sys/cam/scsi/scsi_da.c Mon Dec 16 18:05:28 2019 (r355812) +++ head/sys/cam/scsi/scsi_da.c Mon Dec 16 18:16:44 2019 (r355813) @@ -1516,12 +1516,17 @@ static callout_func_t damediapoll; #define DA_DEFAULT_SEND_ORDERED 1 #endif +#ifndef DA_DEFAULT_MAX_DELETE +#define DA_DEFAULT_MAX_DELETE (1 * 1024 * 1024 * 1024) /* 1GB max trim by default */ +#endif + static int da_poll_period = DA_DEFAULT_POLL_PERIOD; static int da_retry_count = DA_DEFAULT_RETRY; static int da_default_timeout = DA_DEFAULT_TIMEOUT; static sbintime_t da_default_softtimeout = DA_DEFAULT_SOFTTIMEOUT; static int da_send_ordered = DA_DEFAULT_SEND_ORDERED; static int da_disable_wp_detection = 0; +static int64_t da_default_max_delete = DA_DEFAULT_MAX_DELETE; static SYSCTL_NODE(_kern_cam, OID_AUTO, da, CTLFLAG_RD, 0, "CAM Direct Access Disk driver"); @@ -1536,6 +1541,9 @@ SYSCTL_INT(_kern_cam_da, OID_AUTO, send_ordered, CTLFL SYSCTL_INT(_kern_cam_da, OID_AUTO, disable_wp_detection, CTLFLAG_RWTUN, &da_disable_wp_detection, 0, "Disable detection of write-protected disks"); +SYSCTL_INT64(_kern_cam_da, OID_AUTO, default_max_delete, CTLFLAG_RWTUN, + &da_default_max_delete, 0, + "Default system wide maximum delete"); SYSCTL_PROC(_kern_cam_da, OID_AUTO, default_softtimeout, CTLTYPE_UINT | CTLFLAG_RW, NULL, 0, dasysctlsofttimeout, "I", @@ -2500,8 +2508,8 @@ dadeletemaxsize(struct da_softc *softc, da_delete_meth return 0; } - return (off_t)softc->params.secsize * - omin(sectors, softc->params.sectors); + return (off_t)MIN(da_default_max_delete, softc->params.secsize * + omin(sectors, softc->params.sectors)); } static void
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